Merge pull request learningequality#5825 from AlexVelezLl/fix-unpublishable-change

Fix add to community library change making channel publishable

Author: rtibbles

contentcuration/contentcuration/viewsets/community_library_submission.py

@@ -320,7 +320,8 @@ def _add_to_community_library(self, submission):
                 categories=submission.categories,
                 country_codes=country_codes,
             ),
-            created_by_id=submission.resolved_by_id,
+            # This change is not publishable and should not trigger publish-related logic
+            unpublishable=True,
         )
         apply_channel_changes_task.fetch_or_enqueue(
             submission.resolved_by,