Big diff: Use new "|" union syntax (#5872)

stubs/chardet/chardet/universaldetector.pyi

@@ -1,5 +1,5 @@
 from logging import Logger
-from typing import Dict, Optional, Pattern
+from typing import Dict, Pattern
 from typing_extensions import TypedDict
 
 class _FinalResultType(TypedDict):
@@ -8,9 +8,9 @@ class _FinalResultType(TypedDict):
     language: str
 
 class _IntermediateResultType(TypedDict):
-    encoding: Optional[str]
+    encoding: str | None
     confidence: float
-    language: Optional[str]
+    language: str | None
 
 class UniversalDetector(object):
     MINIMUM_THRESHOLD: float