fix queue_file_changes logic on corpus accounts (#425)

Author: bmc-msft

src/api-service/__app__/queue_file_changes/__init__.py

@@ -25,7 +25,7 @@ def file_added(event: Dict) -> None:
 def main(msg: func.QueueMessage, dashboard: func.Out[str]) -> None:
     event = json.loads(msg.get_body())
 
-    if event["topic"] in corpus_accounts():
+    if event["topic"] not in corpus_accounts():
         return
 
     if event["eventType"] != "Microsoft.Storage.BlobCreated":