fix: incomplete type hint for Regex pattern

beanie/odm/operators/find/evaluation.py

@@ -1,5 +1,6 @@
+import re
 from abc import ABC
-from typing import Optional
+from typing import AnyStr, Optional, Union
 
 from beanie.odm.operators.find import BaseFindOperator
 
@@ -100,7 +101,7 @@ def __init__(
         self,
         field,
         pattern: str,
-        options: Optional[str] = None,
+        options: Optional[Union[str, re.Pattern[AnyStr]]] = None,
     ):
         self.field = field
         self.pattern = pattern