renderer: use named import for util class

src/renderer/plugins/i18n.ts

@@ -1,11 +1,11 @@
 import { createI18n } from 'vue-i18n'
 import en from '@/renderer/locales/en.json'
 import ko from '@/renderer/locales/ko.json'
-import Utils from '@/renderer/utils'
+import { getCurrentLocale } from '@/renderer/utils'
 
 export default createI18n({
   legacy: false,
-  locale: Utils.getCurrentLocale(),
+  locale: getCurrentLocale(),
   fallbackLocale: 'en',
   globalInjection: true,
   messages: {