Add taskName to the list of default log attrs

In Python 3.12 the attribute `taskName` was introduced. This broke our
unit tests, as they didn't expect this attribute to be there and added
them to the list of extras

Author: schtibe

logging_utilities/formatters/__init__.py

@@ -20,5 +20,6 @@
     'stack_info',
     'msg',
     'args',
-    'message'
+    'message',
+    'taskName'
 }