Update generator.mjs

Author: mshima

generators/languages/generator.mjs

@@ -34,7 +34,7 @@ import jhipsterUtils from '../utils.js';
 const { languageToJavaLanguage } = jhipsterUtils;
 const { clientI18nFiles } = files;
 const { translationDefaultConfig } = generatorDefaults;
-const SERVER_TEST_SRC_DIR = constants;
+const { SERVER_TEST_SRC_DIR } = constants;
 
 export default class LanguagesGenerator extends BaseApplication {
   constructor(args, options, features) {