Actions: bump flatpak to 6.4 (#159)

* Actions: bump flatpak to 6.4

* Update ci.yml

Author: danirabbit

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
           platforms: arm64
 
       - name: Build
-        uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+        uses: flatpak/flatpak-github-actions/flatpak-builder@v6.4
         with:
           bundle: org.gnome.epiphany.flatpak
           manifest-path: org.gnome.epiphany.json

.github/workflows/merge.yml

@@ -32,7 +32,7 @@ jobs:
           platforms: arm64
 
       - name: Build
-        uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+        uses: flatpak/flatpak-github-actions/flatpak-builder@v6.4
         with:
           bundle: epiphany.flatpak
           manifest-path: org.gnome.epiphany.json
@@ -42,7 +42,7 @@ jobs:
           branch: stable
           arch: ${{ matrix.arch }}
       - name: Deploy
-        uses: flatpak/flatpak-github-actions/flat-manager@v6
+        uses: flatpak/flatpak-github-actions/flat-manager@v6.4
         with:
           repository: appcenter
           flat-manager-url: https://flatpak-api.elementary.io