fix: UDM响应ok默认成功

lib/core/mml_client/send.go

@@ -49,7 +49,7 @@ func MMLSendMsgToString(ip, msg string) (string, error) {
 	}
 
 	// 命令成功
-	if strings.HasPrefix(str, "command ok") {
+	if strings.Contains(str, "ok") {
 		return str, nil
 	}