Fix typo in deprecation message (#15044)

Author: Edge-Seven

stdlib/asyncio/trsock.pyi

@@ -62,7 +62,7 @@ class TransportSocket:
         def listen(self, backlog: int = ..., /) -> None: ...
         @deprecated("Removed in Python 3.11")
         def makefile(self) -> BinaryIO: ...
-        @deprecated("Rmoved in Python 3.11")
+        @deprecated("Removed in Python 3.11")
         def sendfile(self, file: BinaryIO, offset: int = 0, count: int | None = None) -> int: ...
         @deprecated("Removed in Python 3.11")
         def close(self) -> None: ...