pref(app): 优化项目初始的语言设定

src/pages/_app.tsx

@@ -32,7 +32,7 @@ export default function MyApp({
                                 renderConfig
                               }: AppProps & { renderConfig: RenderConfig }) {
   const { arcoLang, arcoTheme } = renderConfig;
-  const [lang, setLang] = useStorage('arco-lang', arcoLang || 'en-US');
+  const [lang, setLang] = useStorage('arco-lang', arcoLang || 'zh-CN');
   const [theme, setTheme] = useStorage('arco-theme', arcoTheme || 'light');
   const router = useRouter();