fix: linting

Author: rubenfonseca

Diff for: aws_lambda_powertools/event_handler/openapi/dependant.py

@@ -91,7 +91,10 @@ def get_dependant(
     return_annotation = endpoint_signature.return_annotation
     if return_annotation is not inspect.Signature.empty:
         type_annotation, param_field = analyze_param(
-            param_name="Return", annotation=return_annotation, value=None, is_path_param=False,
+            param_name="Return",
+            annotation=return_annotation,
+            value=None,
+            is_path_param=False,
         )
         assert param_field is not None