Add mypy error codes to '# type: ignore' comments (#6379)

stubs/waitress/waitress/wasyncore.pyi

@@ -71,7 +71,7 @@ class dispatcher_with_send(dispatcher):
     def initiate_send(self) -> None: ...
     handle_write: Callable[[], None] = ...
     def writable(self) -> bool: ...
-    def send(self, data: bytes) -> None: ...  # type: ignore
+    def send(self, data: bytes) -> None: ...  # type: ignore[override]
 
 def close_all(map: Mapping[int, socket] | None = ..., ignore_all: bool = ...) -> None: ...