Bump docker/metadata-action from 4.1.1 to 4.2.0 (#358)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.1.1 to 4.2.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@5739616...05d22bf)

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

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

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

@@ -175,7 +175,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v4.1.1
+        uses: docker/metadata-action@05d22bf31770de02e20c67c70365453e00227f61 # v4.2.0
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-kubernetes-gateway