Fix capital letter of Parser

It's in a column of descriptions where each description starts with a capital letter. However in this case the translator couldn't have known that it needs to start with a capital letter since JSON is allcaps anyway.

Contributes to issue CURA-9420.

resources/i18n/pt_BR/cura.po

@@ -3913,7 +3913,7 @@ msgstr "Biblioteca de recorte de polígonos"
 #: /home/trin/Gedeeld/Projects/Cura/resources/qml/Dialogs/AboutDialog.qml:155
 msgctxt "@label"
 msgid "JSON parser"
-msgstr "parser JSON"
+msgstr "Parser JSON"
 
 #: /home/trin/Gedeeld/Projects/Cura/resources/qml/Dialogs/AboutDialog.qml:156
 msgctxt "@label"