Fix type-checker and lint CI failures

- Add explicit type hint for cloned_context to fix mypy error
- Fix pre-existing lint error: use raw string for regex pattern

Co-Authored-By: João <joao@crewai.com>

src/crewai/task.py

@@ -671,6 +671,7 @@ Follow these guidelines:
         copied_data = self.model_dump(exclude=exclude)
         copied_data = {k: v for k, v in copied_data.items() if v is not None}
 
+        cloned_context: list["Task"] | None | _NotSpecified
         if self.context is NOT_SPECIFIED:
             cloned_context = self.context
         else:

tests/test_task.py

@@ -1271,7 +1271,7 @@ def test_create_directory_false():
     assert not resolved_dir.exists()
 
     with pytest.raises(
-        RuntimeError, match="Directory .* does not exist and create_directory is False"
+        RuntimeError, match=r"Directory .* does not exist and create_directory is False"
     ):
         task._save_file("test content")