message: fix the typo introduced in pull request
diff: @@ -479,7 +479,7 @@ ZEND_END_ARG_INFO()
  #ifdef SW_USE_MYSQLND
  ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_mysql_coro_escape, 0, 0, 1)
  - ZEND_ARG_INFO(0, String)
  + ZEND_ARG_INFO(0, string)
  ZEND_ARG_INFO(0, flags)
  ZEND_END_ARG_INFO()
  #endif
  