Restore missing uses in GHA

Author: tcompa

.github/workflows/ci_poetry.yml

@@ -131,6 +131,7 @@ jobs:
 
       - name: Add coverage comment to Pull Requests
         id: coverage_comment
+        uses: py-cov-action/python-coverage-comment-action@v3
         env:
           # Base name of the data files to operate on. Defaults to `.coverage'.
           # [env: COVERAGE_FILE].