[google_fonts] Bump down to 6.3.0 since it wasn't published

Author: guidezpl

packages/google_fonts/CHANGELOG.md

@@ -1,8 +1,7 @@
-## 6.3.1 - 2025-07-30
+## 6.3.0 - 2025-08-01
 ### Changed
 - Update AssetManifest to use the builtin Flutter API.
 
-## 6.3.0 - 2024-11-01
 ### Added
 - `Anton SC`
 - `Arsenal SC`

packages/google_fonts/pubspec.yaml

@@ -1,6 +1,6 @@
 name: google_fonts
 description: A Flutter package to use fonts from fonts.google.com. Supports HTTP fetching, caching, and asset bundling.
-version: 6.3.1
+version: 6.3.0
 repository: https://github.com/material-foundation/flutter-packages/tree/main/packages/google_fonts
 issue_tracker: https://github.com/material-foundation/flutter-packages/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_fonts%22
 screenshots: