.github: Bump docker/build-push-action from 6.16.0 to 6.18.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.16.0 to 6.18.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](14487ce63c...263435318d)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 6.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/docker.yml

@@ -48,7 +48,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@14487ce63c7a62a4a324b0bfb37086795e31c6c1 # v6.16.0
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: .
           push: ${{ github.event_name == 'push' }}