GFK: Update links to Source Serif and Sans

cc-by-sa/knowledge/glossary/terms/hierarchy/content.md

@@ -5,7 +5,7 @@ Hierarchy refers to the overall structure of a document and the relationship bet
 
 ![An article-like layout, with each element wrapped in a bounding box, from the level-one heading that serves as a heading for the entire content, to the level-two heading that relates to the second paragraph, to the pull quote off to one side.](images/thumbnail.svg)
 
-<figcaption>Typeface: <a href="https://fonts.google.com/specimen/Source+Serif+Pro">Source Serif Pro</a></figcaption>
+<figcaption>Typeface: <a href="https://fonts.google.com/specimen/Source+Serif+4">Source Serif 4</a></figcaption>
 
 </figure>
 

cc-by-sa/knowledge/glossary/terms/italic/content.md

@@ -1,7 +1,7 @@
 
 Italic is a [type](/glossary/type) [style](/glossary/style) that's almost always slanted and is designed to create emphasis in [text](/glossary/text_copy). Originally based on semi-cursive forms, italics are a direct contrast to the [upright](/glossary/regular_upright) style.
 
-Unlike [obliques](/glossary/oblique), which are slanted versions of the upright forms, italics have a different structure informed by cursive handwriting—with their own nuances. Some italics differ wildly from their roman counterparts, such as those in [Bodoni Moda](https://fonts.google.com/specimen/Bodoni+Moda), [IBM Plex Serif](https://fonts.google.com/specimen/IBM+Plex+Serif?sort=date&category=Serif), and [Source Serif Pro](https://fonts.google.com/specimen/Source+Serif+Pro?sort=date&category=Serif).
+Unlike [obliques](/glossary/oblique), which are slanted versions of the upright forms, italics have a different structure informed by cursive handwriting—with their own nuances. Some italics differ wildly from their roman counterparts, such as those in [Bodoni Moda](https://fonts.google.com/specimen/Bodoni+Moda), [IBM Plex Serif](https://fonts.google.com/specimen/IBM+Plex+Serif?sort=date&category=Serif), and [Source Serif 4](https://fonts.google.com/specimen/Source+Serif+4?sort=date&category=Serif).
 
 <figure>
 

cc-by-sa/knowledge/glossary/terms/serif/content.md

@@ -9,4 +9,4 @@
 
 We often refer to serif typefaces simply as “serifs,” but really we’re describing a serif typeface with a design that uses serifs in its [letterforms](/glossary/letterform). There are many sub-genres of serif type. For a detailed look at [classifications](/glossary/classification) broken down by genre and historical period, please read our article, [“Making sense of typographic classifications.”](/lesson/making_sense_of_typographic_classifications)
 
-Examples of serif typefaces include [EB Garamond](https://fonts.google.com/specimen/EB+Garamond?sort=popularity&category=Serif), [Merriweather](https://fonts.google.com/specimen/Merriweather?sort=popularity&category=Serif), [Noto Serif](https://fonts.google.com/specimen/Noto+Serif?sort=popularity&category=Serif), [Source Serif Pro](https://fonts.google.com/specimen/Source+Serif+Pro?sort=popularity&category=Serif), and [Alegreya](https://fonts.google.com/specimen/Alegreya?sort=popularity&category=Serif).
+Examples of serif typefaces include [EB Garamond](https://fonts.google.com/specimen/EB+Garamond?sort=popularity&category=Serif), [Merriweather](https://fonts.google.com/specimen/Merriweather?sort=popularity&category=Serif), [Noto Serif](https://fonts.google.com/specimen/Noto+Serif?sort=popularity&category=Serif), [Source Serif 4](https://fonts.google.com/specimen/Source+Serif+4?sort=popularity&category=Serif), and [Alegreya](https://fonts.google.com/specimen/Alegreya?sort=popularity&category=Serif).

cc-by-sa/knowledge/glossary/terms/superfamily/content.md

@@ -9,4 +9,4 @@ A superfamily is the collective grouping of several explicitly related [type](/g
 
 It’s common for a [typeface](/glossary/typeface) to be made up of several variants—usually [weight](/glossary/weight)s—and this is referred to as a “family.” When the variants are more plentiful, especially when the family includes variants across typeface genres (e.g. serif and sans), it can be referred to as a “superfamily.” Variable fonts make it possible to deploy an entire superfamily as a single font file.
 
-Examples of superfamilies include [Source](https://fonts.google.com/?query=source) ([Sans](https://fonts.google.com/specimen/Source+Sans+Pro), [Serif](https://fonts.google.com/specimen/Source+Serif+Pro), [Code](https://fonts.google.com/specimen/Source+Code+Pro)), [IBM Plex](https://fonts.google.com/?query=ibm+plex) ([Sans](https://fonts.google.com/specimen/IBM+Plex+Sans), [Sans Condensed](https://fonts.google.com/specimen/IBM+Plex+Sans+Condensed), [Serif](https://fonts.google.com/specimen/IBM+Plex+Serif), [Mono](https://fonts.google.com/specimen/IBM+Plex+Mono)), and [Roboto](https://fonts.google.com/?query=roboto) ([Sans](https://fonts.google.com/specimen/Roboto), [Sans Condensed](https://fonts.google.com/specimen/Roboto+Condensed), [Serif](https://fonts.google.com/specimen/Roboto+Serif), [Slab](https://fonts.google.com/specimen/Roboto+Slab), [Mono](https://fonts.google.com/specimen/Roboto+Mono)).
+Examples of superfamilies include [Source](https://fonts.google.com/?query=source) ([Sans](https://fonts.google.com/specimen/Source+Sans+3), [Serif](https://fonts.google.com/specimen/Source+Serif+4), [Code](https://fonts.google.com/specimen/Source+Code+Pro)), [IBM Plex](https://fonts.google.com/?query=ibm+plex) ([Sans](https://fonts.google.com/specimen/IBM+Plex+Sans), [Sans Condensed](https://fonts.google.com/specimen/IBM+Plex+Sans+Condensed), [Serif](https://fonts.google.com/specimen/IBM+Plex+Serif), [Mono](https://fonts.google.com/specimen/IBM+Plex+Mono)), and [Roboto](https://fonts.google.com/?query=roboto) ([Sans (Flex)](https://fonts.google.com/specimen/Roboto+Flex), [Sans (Classic)](https://fonts.google.com/specimen/Roboto), [Sans Condensed (Classic)](https://fonts.google.com/specimen/Roboto+Condensed), [Serif](https://fonts.google.com/specimen/Roboto+Serif), [Slab](https://fonts.google.com/specimen/Roboto+Slab), [Mono](https://fonts.google.com/specimen/Roboto+Mono)).

cc-by-sa/knowledge/modules/choosing_type/lessons/a_checklist_for_choosing_type/content.md

@@ -101,7 +101,7 @@ It’s entirely possible for a typeface to be suitable for a project—especiall
 
 ![A montage of Regular, Italic, Bold, and Bold Italic  weights and styles.](images/a_checklist_for_choosing_type_6.svg)
 
-<figcaption>Typeface: <a href="https://fonts.google.com/specimen/Source+Serif+Pro">Source Serif Pro</a></figcaption>
+<figcaption>Typeface: <a href="https://fonts.google.com/specimen/Source+Serif+4">Source Serif 4</a></figcaption>
 
 </figure>