xml: update for security fix (#11648)

Fixes #11643

stdlib/pyexpat/__init__.pyi

@@ -32,6 +32,8 @@ class XMLParserType:
     def ExternalEntityParserCreate(self, context: str | None, encoding: str = ..., /) -> XMLParserType: ...
     def SetParamEntityParsing(self, flag: int, /) -> int: ...
     def UseForeignDTD(self, flag: bool = True, /) -> None: ...
+    def GetReparseDeferralEnabled(self) -> bool: ...
+    def SetReparseDeferralEnabled(self, enabled: bool, /) -> None: ...
     @property
     def intern(self) -> dict[str, str]: ...
     buffer_size: int