build: capturing new migrations.

.github/workflows/capture_new_migrations.yml

@@ -178,9 +178,15 @@ jobs:
         data=$(mysql -h 127.0.0.1 -uedxapp001 -ppassword -e "select app, name from django_migrations ORDER by -id limit $diff;" edxapp;)
         echo "$data" > cleaned_data.txt
       shell: bash
+
+    - name: Comment PR
       uses: thollander/actions-comment-pull-request@v2
       with:
-        message: $data
+        message:  |
+          Here is the data:
+          ```
+          $(cat cleaned_data.txt)
+          ```
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   # This job aggregates test results. It's the required check for branch protection.