fix mypy check

Author: chang-ph

ninja/signature/details.py

@@ -7,7 +7,7 @@
 from django.http import HttpResponse
 from pydantic.fields import FieldInfo
 from pydantic_core import PydanticUndefined
-from typing_extensions import Annotated, get_args, get_origin
+from typing_extensions import Annotated, Unpack, get_args, get_origin
 
 from ninja import UploadedFile
 from ninja.compatibility.util import UNION_TYPES
@@ -371,7 +371,12 @@ def detect_collection_fields(
     return result
 
 
-def _detect_collection_fields(annotation_or_field, attr, path, result):
+def _detect_collection_fields(
+    annotation_or_field: Any,
+    attr: str,
+    path: Tuple[str, ...],
+    result: List[Any],
+) -> Any:
     annotation_or_field = next(
         (a for a in annotation_or_field.model_fields.values() if a.alias == attr),
         annotation_or_field.model_fields.get(attr),