Bump vlaurin/action-ghcr-prune from 0.5.0 to 0.6.0 (#704)

Bumps [vlaurin/action-ghcr-prune](https://github.com/vlaurin/action-ghcr-prune) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/vlaurin/action-ghcr-prune/releases)
- [Commits](vlaurin/action-ghcr-prune@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: vlaurin/action-ghcr-prune
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/cleanup_container_tags.yml

@@ -32,7 +32,7 @@ jobs:
           echo -e "\e[35m\e[tag=${TAG} >> \$GITHUB_OUTPUT\e[0m"
           echo "tag=${TAG}" >> ${GITHUB_OUTPUT}
       - name: Delete tags
-        uses: vlaurin/action-ghcr-prune@v0.5.0
+        uses: vlaurin/action-ghcr-prune@v0.6.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           organization: tue-robotics