Update docker/metadata-action action to v6

.gitea/workflows/docker-build-and-push.yml

@@ -60,7 +60,7 @@ jobs:
       - 
         name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v5.10.0
+        uses: docker/metadata-action@v6.0.0
         with:
           images: |
             ghcr.io/${{ vars.GH_USERNAME }}/icons
@@ -73,7 +73,7 @@ jobs:
             type=raw,value=latest
       - 
         name: Build and push
-        uses: docker/build-push-action@v6.19.2
+        uses: docker/build-push-action@v6.18.0
         with:
           context: ./build
           push: ${{ gitea.event_name != 'pull_request' }}