Update canonical/charming-actions action to v2.7.0

Author: renovate[bot]

.github/workflows/release.yaml

@@ -21,7 +21,7 @@ jobs:
           # Workaround for https://github.com/canonical/charmcraft/issues/1389#issuecomment-1880921728
           touch requirements.txt
       - name: Check libs
-        uses: canonical/charming-actions/check-libraries@2.6.3
+        uses: canonical/charming-actions/check-libraries@2.7.0
         with:
           credentials: ${{ secrets.CHARMHUB_TOKEN }} # FIXME: current token will expire in 2023-07-04
           github-token: ${{ secrets.GITHUB_TOKEN }}