Bump docker/build-push-action from 6.16.0 to 6.18.0 (#504)

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](docker/build-push-action@14487ce...2634353)

---
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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -97,7 +97,7 @@ jobs:
             description="The NGINX Ingress Operator is a Kubernetes/OpenShift component which deploys and manages one or more NGINX/NGINX Plus Ingress Controllers"
 
       - name: Build Image
-        uses: docker/build-push-action@14487ce63c7a62a4a324b0bfb37086795e31c6c1 # v6.16.0
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: "."
           cache-from: type=gha