Update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -31,7 +31,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push containers
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           platforms: linux/arm,linux/amd64,linux/arm64/v8
           push: true