Big diff: use lower-case list and dict (#5888)

stdlib/nis.pyi

@@ -1,9 +1,8 @@
 import sys
-from typing import Dict, List
 
 if sys.platform != "win32":
-    def cat(map: str, domain: str = ...) -> Dict[str, str]: ...
+    def cat(map: str, domain: str = ...) -> dict[str, str]: ...
     def get_default_domain() -> str: ...
-    def maps(domain: str = ...) -> List[str]: ...
+    def maps(domain: str = ...) -> list[str]: ...
     def match(key: str, map: str, domain: str = ...) -> str: ...
     class error(Exception): ...