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

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -171,13 +171,13 @@ jobs:
           OUT_WEB=$(echo "$OUT_WEB" | awk '{print tolower($0)}')
           echo ::set-output name=docker_web_tags::$OUT_WEB
 
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         with:
           push: true
           context: .
           file: ./Dockerfile.api
           tags: ${{ steps.step1.outputs.docker_api_tags }}
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         with:
           push: true
           context: .