chore(deps): update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/docker-image.yml

@@ -25,7 +25,7 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true