test: use an always-unsupported scheme now that kafka:// is

  supported

Author: muhammetsafak

tests/test_app.py

@@ -118,7 +118,7 @@ def test_unsupported_broker_scheme_raises(self) -> None:
         from babelqueue import BabelQueueError
 
         with self.assertRaises(BabelQueueError):
-            BabelQueue("kafka://localhost:9092")
+            BabelQueue("frobnicate://localhost:9092")
 
 
 if __name__ == "__main__":