chore(deps): bump docker/metadata-action from 4.6.0 to 5.0.0 (#45)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.6.0 to 5.0.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](https://github.com/docker/metadata-action/compare/v4.6.0...v5.0.0)

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

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

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v3
       - name: Prepare
         id: prep
-        uses: docker/metadata-action@v4.6.0
+        uses: docker/metadata-action@v5.0.0
         with:
           images: |
             ${{ github.repository_owner }}/mediawiki-ldap