Update docs/customization/python_class.md

Co-authored-by: Wei Lee <weilee.rx@gmail.com>

Author: bearomorphism

docs/customization/python_class.md

@@ -43,7 +43,7 @@ class JiraCz(BaseCommitizen):
 
     def message(self, answers: dict) -> str:
         """Generate the message with the given answers."""
-        return "{0} (#{1})".format(answers["title"], answers["issue"])
+        return f"answers['title'] (#answers['issue'])"
 
     def example(self) -> str:
         """Provide an example to help understand the style (OPTIONAL)