build(deps): bump schubergphilis/mcvs-docker-action from 0.5.6 to 0.6.0

Bumps [schubergphilis/mcvs-docker-action](https://github.com/schubergphilis/mcvs-docker-action) from 0.5.6 to 0.6.0.
- [Release notes](https://github.com/schubergphilis/mcvs-docker-action/releases)
- [Commits](schubergphilis/mcvs-docker-action@v0.5.6...v0.6.0)

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

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

.github/workflows/docker.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/[email protected]
-      - uses: schubergphilis/mcvs-docker-action@v0.5.6
+      - uses: schubergphilis/mcvs-docker-action@v0.6.0
         with:
           dockle-accept-key: libcrypto3,libssl3
           token: ${{ secrets.GITHUB_TOKEN }}