Use Incomplete instead of Any in __getattr__ (#8903)

stdlib/encodings/__init__.pyi

@@ -1,5 +1,5 @@
+from _typeshed import Incomplete
 from codecs import CodecInfo
-from typing import Any
 
 class CodecRegistryError(LookupError, SystemError): ...
 
@@ -7,4 +7,4 @@ def normalize_encoding(encoding: str | bytes) -> str: ...
 def search_function(encoding: str) -> CodecInfo | None: ...
 
 # Needed for submodules
-def __getattr__(name: str) -> Any: ...  # incomplete
+def __getattr__(name: str) -> Incomplete: ...