fix: 修正国际化语言代码格式从'zh-CN'到'zh_CN'

src/main.js

@@ -62,7 +62,7 @@ import fileMain from '@/components/addDoc/index.vue';
 import FormMaking from '../lib/vue-form-making/src/index';
 
 Vue.use(FormMaking, {
-  lang: 'zh-CN',
+  lang: 'zh_CN',
   i18n: i18n
 });
 Vue.component('fileMain', fileMain);