F-Droid recipe: new categories, pin v1.4 commit hash

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

fdroid/com.lpw.graypause.yml

@@ -1,7 +1,6 @@
-# Draft for https://gitlab.com/fdroid/fdroiddata (metadata/com.lpw.graypause.yml).
 Categories:
   - System
-  - Theming
+  - Timer
 License: GPL-3.0-or-later
 AuthorName: metaheavens
 SourceCode: https://metaheavens.de/forgejo/metaheavens/graypause
@@ -15,7 +14,7 @@ Repo: https://metaheavens.de/forgejo/metaheavens/graypause.git
 Builds:
   - versionName: '1.4'
     versionCode: 5
-    commit: v1.4
+    commit: 8f901ba07c619692708284263864fbb1a0da2c47
     subdir: app
     gradle:
       - yes