enable verbosity on flatpak build

Author: rainu

.github/workflows/build.yml

@@ -173,6 +173,7 @@ jobs:
       - name: Linux - Build (debug)
         uses: flatpak/flatpak-github-actions/flatpak-builder@v6
         with:
+          verbose: true
           manifest-path: de.rainu.ask-mai.yml
           cache-key: flatpak-builder-${{ github.sha }}
           bundle: ask-mai-linux-amd64-debug.flatpak