chore(deps): bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/docker-build-push.yml

@@ -82,7 +82,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_SB_PASSWORD }}
 
       - name: Build docker image and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true
@@ -91,7 +91,7 @@ jobs:
           tags: swaggerapi/swagger-editor:next-v5,swaggerapi/swagger-editor:v${{ env.RELEASED_VERSION }}
 
       - name: Build unprivileged docker image and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile.unprivileged