Add missing message-id to step which modifies PR comment

Author: antonwolfy

.github/workflows/build-sphinx.yml

@@ -266,6 +266,7 @@ jobs:
       - name: Modify the comment with URL to official documentation
         uses: mshick/add-pr-comment@b8f338c590a895d50bcbfa6c5859251edc8952fc # v2.8.2
         with:
+          message-id: url_to_docs
           find: |
             View rendered docs @.+
           replace: |