Build Flatpak for aarch64 architecture

Author: d-k-bo

.github/workflows/ci.yaml

@@ -11,15 +11,25 @@ on:
 jobs:
   flatpak:
     name: "Flatpak"
-    runs-on: ubuntu-latest
     container:
-      image: bilelmoussaoui/flatpak-github-actions:gnome-47
+      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-47
       options: --privileged
+    strategy:
+      matrix:
+        variant:
+          - arch: x86_64
+            runner: ubuntu-24.04
+          - arch: aarch64
+            runner: ubuntu-24.04-arm
+      fail-fast: false
+    runs-on: ${{ matrix.variant.runner }}
     steps:
       - uses: actions/checkout@v4
-      - uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+      - uses: flathub-infra/flatpak-github-actions/flatpak-builder@master
         with:
           bundle: televido.flatpak
           manifest-path: build-aux/de.k_bo.Televido.Devel.json
           cache-key: flatpak-builder-${{ github.sha }}
           run-tests: true
+          arch: ${{ matrix.variant.arch }}
+          verbose: true