Fix import

Author: stephanlukasczyk

src/pynguin/assertion/mutation_analysis/controller.py

@@ -11,14 +11,14 @@
 import logging
 
 from typing import TYPE_CHECKING
-from typing import Generator
 
 from pynguin.assertion.mutation_analysis.transformer import create_module
 
 
 if TYPE_CHECKING:
     import types
 
+    from collections.abc import Generator
     from types import ModuleType
 
     import pynguin.assertion.mutation_analysis.mutators as mu