Chore(deps): Bump peter-evans/dockerhub-description from 4 to 5

Bumps [peter-evans/dockerhub-description](https://github.com/peter-evans/dockerhub-description) from 4 to 5.
- [Release notes](https://github.com/peter-evans/dockerhub-description/releases)
- [Commits](https://github.com/peter-evans/dockerhub-description/compare/v4...v5)

---
updated-dependencies:
- dependency-name: peter-evans/dockerhub-description
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/markdown.yml

@@ -37,7 +37,7 @@ jobs:
           use-quiet-mode: yes
           config-file: .github/workflows/configs/mlc-config.json
 
-      - uses: peter-evans/dockerhub-description@v4
+      - uses: peter-evans/dockerhub-description@v5
         if: github.repository == 'qdm12/gluetun' && github.event_name == 'push'
         with:
           username: qmcgaw