designers/khaledhosny: Add bio and update avatar (#2925)

* designers/khaledhosny: Add bio and update avatar

* Update bio.html

Based on Marc's suggestion.

catalog/designers/khaledhosny/bio.html

@@ -0,0 +1,2 @@
+<p>Khaled Hosny is an Egyptian type designer who specializes in Arabic type design, and a software developer whose areas of expertise include font engineering, text layout, localization, and internationalization. Khaled is also an amateur artist.</p>
+<p><a href="https://github.com/khaledhosny" target="_blank">Github</a> | <a href="https://twitter.com/KhaledGhetas" target="_blank">Twitter</a></p>

catalog/designers/khaledhosny/info.pb

@@ -1,5 +1,5 @@
 designer: "Khaled Hosny"
-link: "https://profiles.google.com/dr.khaled.hosny/about"
+link: "https://aliftype.com/"
 avatar: {
-  file_name: "khaled_hosny.png"
+  file_name: "khaledhosny.png"
 }