fix: update content reported notification (#35315)

lms/djangoapps/discussion/django_comment_client/base/tests.py

@@ -1458,6 +1458,8 @@ class CreateSubCommentUnicodeTestCase(
 @disable_signal(views, 'comment_created')
 @disable_signal(views, 'comment_voted')
 @disable_signal(views, 'comment_deleted')
+@disable_signal(views, 'comment_flagged')
+@disable_signal(views, 'thread_flagged')
 class TeamsPermissionsTestCase(ForumsEnableMixin, UrlResetMixin, SharedModuleStoreTestCase, MockRequestSetupMixin):
     # Most of the test points use the same ddt data.
     # args: user, commentable_id, status_code

lms/djangoapps/discussion/rest_api/discussions_notifications.py

@@ -314,7 +314,7 @@ class DiscussionNotificationSender:
         content_type = thread_types[self.thread.type][getattr(self.thread, 'depth', 0)]
 
         context = {
-            'username': self.creator.username,
+            'username': self.thread.username,
             'content_type': content_type,
             'content': thread_body
         }

lms/djangoapps/discussion/rest_api/tests/test_discussions_notifications.py

@@ -44,7 +44,7 @@ class TestDiscussionNotificationSender(unittest.TestCase):
 
         self.assertEqual(notification_type, "content_reported")
         self.assertEqual(context, {
-            'username': 'test_user',
+            'username': self.thread.username,
             'content_type': expected_content_type,
             'content': 'Thread body'
         })