update readm

order-events/app/events/billing/cancel_enrollment.py

@@ -30,7 +30,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
         + SortKey('METADATA#SUBSCRIPTION_COVERED')
         # Post-migration: uncomment the following line
         # + SortKey('CANCELED', path_spec='canceled_by', rename_key='canceled_by')
-        + SortKey('canceled', path_spec='author', rename_key='canceled_by')
+        + SortKey('CANCELED', path_spec='author', rename_key='canceled_by')
     )
 
     created_at: datetime = fromisoformat(new_image['created_at'])  # type: ignore
@@ -67,7 +67,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
                 'created_at': now_,
             }
             | pick(('user', 'course', 'enrolled_at'), old_enrollment)
-            # Add author if present
+            # Add created_by if present
             | ({'author': canceled_by} if canceled_by else {}),
             # Post-migration: uncomment the following line
             # | ({'created_by': canceled_by} if canceled_by else {}),