msvcrt: improve bytes handling (#9071)

Author: JelleZijlstra

stdlib/msvcrt.pyi

@@ -21,8 +21,8 @@ if sys.platform == "win32":
     def getwch() -> str: ...
     def getche() -> bytes: ...
     def getwche() -> str: ...
-    def putch(__char: bytes) -> None: ...
+    def putch(__char: bytes | bytearray) -> None: ...
     def putwch(__unicode_char: str) -> None: ...
-    def ungetch(__char: bytes) -> None: ...
+    def ungetch(__char: bytes | bytearray) -> None: ...
     def ungetwch(__unicode_char: str) -> None: ...
     def heapmin() -> None: ...