chore(locale): rename Uyghur language code (#3908)

src/runtime/locale/index.ts

@@ -42,4 +42,4 @@ export { default as uz } from './uz'
 export { default as vi } from './vi'
 export { default as zh_cn } from './zh_cn'
 export { default as zh_tw } from './zh_tw'
-export { default as zh_ug } from './zh_ug'
+export { default as ug_cn } from './ug_cn'

src/runtime/locale/ug_cn.ts

@@ -3,7 +3,7 @@ import { defineLocale } from '../composables/defineLocale'
 
 export default defineLocale<Messages>({
   name: 'ئۇيغۇرچە',
-  code: 'zh-UG',
+  code: 'ug-CN',
   dir: 'rtl',
   messages: {
     inputMenu: {