Rename variable just to confirm if CI fails

Expecting to see the following:

    fixture 'mocker' not found

tests/test_tumblesle_release.py

@@ -194,6 +194,7 @@ def test_notifications_are_sent(args, mocker):
 host = localhost
 """
             )
+        # the following is a magical variable name
         mocker.patch("pika.BlockingConnection")
         tr = tumblesle_release.TumblesleRelease(args)
         tr.one_run()