fix: rename type validation

`None` can be passed which is acceptable here.

TODO: Make slackdict accept none as bool and convert to False

frappe/model/document.py

@@ -1041,9 +1041,7 @@ class Document(BaseDocument):
 		return self._cancel()
 
 	@frappe.whitelist()
-	def rename(
-		self, name: str, merge: bool = False, force: bool = False, validate_rename: bool = True
-	):
+	def rename(self, name: str, merge=False, force=False, validate_rename=True):
 		"""Rename the document to `name`. This transforms the current object."""
 		return self._rename(name=name, merge=merge, force=force, validate_rename=validate_rename)
 

frappe/utils/typing_validations.py

@@ -1,7 +1,7 @@
 from collections.abc import Callable
 from functools import lru_cache, wraps
 from inspect import _empty, isclass, signature
-from types import EllipsisType
+from types import EllipsisType, NoneType
 from typing import ForwardRef, TypeVar, Union
 
 from pydantic import ConfigDict