Bump the actions group with 1 update

Bumps the actions group with 1 update: [docker/metadata-action](https://github.com/docker/metadata-action).


Updates `docker/metadata-action` from 5.3.0 to 5.4.0
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@v5.3.0...v5.4.0)

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

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

.github/workflows/docker-image.yml

@@ -26,7 +26,7 @@ jobs:
 
       - name: Extract metadata (tags, labels)
         id: meta
-        uses: docker/metadata-action@v5.3.0
+        uses: docker/metadata-action@v5.4.0
         with:
           images: ghcr.io/t-richards/password-generator