Update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/app-build.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Create publish bundle
         run: mkdir -p build/gh-app-publish/; find app/build/ -iname "*.apk" -exec mv "{}" build/gh-app-publish/ \;
       - name: Upload artifacts
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7
         with:
           name: build-artifacts
           retention-days: 14