🐛 fix(ci): usa upload-artifact da GitHub per compatibilità Gitea

- gitea.com/actions/upload-artifact@v3 usa @actions/artifact v2.0.0+ non compatibile con GHES/Gitea
- github.com/actions/upload-artifact@v3 usa @actions/artifact v1.x compatibile

Fixes #6 @15m

.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@v3
+        uses: https://github.com/actions/upload-artifact@v3
         with:
           name: android-${{ inputs.build-type || 'debug' }}-apk
           path: android/app/build/outputs/apk/${{ inputs.build-type || 'debug' }}/*.apk
@@ -131,7 +131,7 @@ jobs:
 
       - name: Upload AAB artifact
         if: inputs.output-format == 'aab'
-        uses: https://gitea.com/actions/upload-artifact@v3
+        uses: https://github.com/actions/upload-artifact@v3
         with:
           name: android-release-aab
           path: android/app/build/outputs/bundle/release/*.aab
@@ -139,7 +139,7 @@ jobs:
 
       - name: Upload Gradle build reports
         if: always()
-        uses: https://gitea.com/actions/upload-artifact@v3
+        uses: https://github.com/actions/upload-artifact@v3
         with:
           name: gradle-build-reports
           path: android/build/reports/