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

stdlib/_thread.pyi

@@ -1,7 +1,7 @@
 import sys
 from threading import Thread
 from types import TracebackType
-from typing import Any, Callable, Dict, NoReturn, Optional, Tuple, Type
+from typing import Any, Callable, NoReturn, Optional, Tuple, Type
 
 error = RuntimeError
 
@@ -18,7 +18,7 @@ class LockType:
         self, type: Type[BaseException] | None, value: BaseException | None, traceback: TracebackType | None
     ) -> None: ...
 
-def start_new_thread(function: Callable[..., Any], args: Tuple[Any, ...], kwargs: Dict[str, Any] = ...) -> int: ...
+def start_new_thread(function: Callable[..., Any], args: Tuple[Any, ...], kwargs: dict[str, Any] = ...) -> int: ...
 def interrupt_main() -> None: ...
 def exit() -> NoReturn: ...
 def allocate_lock() -> LockType: ...