CI: Bump Flatpak actions to v6

.github/workflows/flatpak.yml

@@ -80,7 +80,7 @@ jobs:
           echo "cache_hit=$CACHE_HIT" >> $GITHUB_OUTPUT
 
       - name: Build Flatpak Manifest
-        uses: flatpak/flatpak-github-actions/flatpak-builder@83ec7c1998a152b7d47507a2da5d7a4b21e612ff
+        uses: flatpak/flatpak-github-actions/flatpak-builder@v6
         with:
           bundle: obs-studio-${{ steps.setup.outputs.git_hash }}.flatpak
           manifest-path: CI/flatpak/com.obsproject.Studio.json
@@ -107,7 +107,7 @@ jobs:
           ostree commit --repo=repo --canonical-permissions --branch=screenshots/x86_64 flatpak_app/screenshots
 
       - name: Publish to Flathub Beta
-        uses: flatpak/flatpak-github-actions/flat-manager@v5
+        uses: flatpak/flatpak-github-actions/flat-manager@v6
         if: matrix.branch == 'beta'
         with:
           flat-manager-url: https://hub.flathub.org/
@@ -115,7 +115,7 @@ jobs:
           token: ${{ secrets.FLATHUB_BETA_TOKEN }}
 
       - name: Publish to Flathub
-        uses: flatpak/flatpak-github-actions/flat-manager@v5
+        uses: flatpak/flatpak-github-actions/flat-manager@v6
         if: matrix.branch == 'stable'
         with:
           flat-manager-url: https://hub.flathub.org/

.github/workflows/main.yml

@@ -376,7 +376,7 @@ jobs:
           echo "cache_hit=$CACHE_HIT" >> $GITHUB_OUTPUT
 
       - name: Build Flatpak Manifest
-        uses: flatpak/flatpak-github-actions/flatpak-builder@83ec7c1998a152b7d47507a2da5d7a4b21e612ff
+        uses: flatpak/flatpak-github-actions/flatpak-builder@v6
         with:
           build-bundle: ${{ fromJSON(needs.config.outputs.create_artifacts) }}
           bundle: obs-studio-flatpak-${{ steps.setup.outputs.git_hash }}.flatpak