Case sensitive list converter as one-liner

[Anselmoo]

Checklist

• [x] I think this refactoring is useful for everyone (if it's too specific, consider a custom rule)
• [x] I have checked there are no similar issues suggesting the same thing

Description

Sourcery already suggests dependencies as one-liners. There might be a new one for creating optional list

Code Before

In case you have work in your functions or class with iterators.

def example(func_name: str | list[str]):
      if isinstance(func_name, str):
            func_name = [func_name]

Code After

def example(func_name: str | list[str]):
      func_name = [func_name] if isinstance(func_name, str) else func_name