🐛 fix(ci): downgrade upload-artifact da v4 a v3 per compatibilità Gitea

- upload-artifact@v4 usa @actions/artifact v2.0.0+ che richiede API GitHub.com
- Gitea/GHES non supporta questa versione, causando errore GHESNotSupportedError

Fixes #4 @25m

.gitea/workflows/capacitor-android.yml

@@ -123,7 +123,7 @@ jobs:
 
       - name: Upload APK artifact
         if: inputs.output-format == 'apk'
-        uses: https://gitea.com/actions/upload-artifact@v4
+        uses: https://gitea.com/actions/upload-artifact@v3
         with:
           name: android-${{ inputs.build-type }}-apk
           path: android/app/build/outputs/apk/${{ inputs.build-type }}/*.apk
@@ -131,7 +131,7 @@ jobs:
 
       - name: Upload AAB artifact
         if: inputs.output-format == 'aab'
-        uses: https://gitea.com/actions/upload-artifact@v4
+        uses: https://gitea.com/actions/upload-artifact@v3
         with:
           name: android-release-aab
           path: android/app/build/outputs/bundle/release/*.aab