Bump docker/metadata-action from 4 to 5

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4 to 5.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](docker/metadata-action@v4...v5)

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

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

.github/workflows/ci.yaml

@@ -79,7 +79,7 @@ jobs:
 
         - name: Docker meta
           id: meta
-          uses: docker/metadata-action@v4
+          uses: docker/metadata-action@v5
           with:
             images: |
               ghcr.io/nginxinc/kic-test-${{ matrix.type }}-server
@@ -146,7 +146,7 @@ jobs:
 
         - name: Docker meta
           id: meta
-          uses: docker/metadata-action@v4
+          uses: docker/metadata-action@v5
           with:
             images: |
               ghcr.io/nginxinc/kic-test-grpc-server
@@ -212,7 +212,7 @@ jobs:
 
         - name: Docker meta
           id: meta
-          uses: docker/metadata-action@v4
+          uses: docker/metadata-action@v5
           with:
             images: |
               ghcr.io/nginxinc/kic-test-dos-server