Bump docker/metadata-action from 4.3.0 to 4.4.0 (#581)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@507c2f2...c4ee3ad)

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

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Author: dependabot[bot]

.github/workflows/ci.yml

@@ -178,7 +178,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v4.3.0
+        uses: docker/metadata-action@c4ee3adeed93b1fa6a762f209fb01608c1a22f1e # v4.4.0
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-kubernetes-gateway