Add missing self in function doc

Author: tannewt

shared-bindings/socketpool/SocketPool.c

@@ -91,7 +91,7 @@ STATIC mp_obj_t socketpool_socketpool_socket(size_t n_args, const mp_obj_t *pos_
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(socketpool_socketpool_socket_obj, 1, socketpool_socketpool_socket);
 
-//|     def getaddrinfo(host: str, port: int, family: int = 0, type: int = 0, proto: int = 0, flags: int = 0) -> Tuple[int, int, int, str, Tuple[str, int]]:
+//|     def getaddrinfo(self, host: str, port: int, family: int = 0, type: int = 0, proto: int = 0, flags: int = 0) -> Tuple[int, int, int, str, Tuple[str, int]]:
 //|         """Gets the address information for a hostname and port
 //|
 //|         Returns the appropriate family, socket type, socket protocol and