Use PEP 585 syntax wherever possible (#6717)

stdlib/binhex.pyi

@@ -1,4 +1,4 @@
-from typing import IO, Any, Tuple, Union
+from typing import IO, Any, Union
 
 class Error(Exception): ...
 
@@ -12,7 +12,7 @@ class FInfo:
     Creator: str
     Flags: int
 
-_FileInfoTuple = Tuple[str, FInfo, int, int]
+_FileInfoTuple = tuple[str, FInfo, int, int]
 _FileHandleUnion = Union[str, IO[bytes]]
 
 def getfileinfo(name: str) -> _FileInfoTuple: ...