Leave warning about changing generated comment (#25660)

ARCHBOM-1544

lms/djangoapps/monitoring/scripts/generate_code_owner_mappings.py

@@ -104,6 +104,9 @@ def main(repo_csv, app_csv, dep_csv):
     _map_repo_apps('3rd-party', dep_csv, THIRD_PARTY_APPS, owner_map, owner_to_paths_map)
     _map_edx_platform_apps(app_csv, owner_map, owner_to_paths_map)
 
+    # NB: An automated script looks for this comment when updating config files,
+    # so please update regenerate_code_owners_config.py in jenkins-job-dsl-internal
+    # if you change the comment format here.
     print('# Do not hand edit CODE_OWNER_MAPPINGS. Generated by {}'.format(os.path.basename(__file__)))
     print('CODE_OWNER_MAPPINGS:')
     for owner, path_list in sorted(owner_to_paths_map.items()):