Update site-constants.js

Author: rickhanlonii

src/siteConfig.js

@@ -5,7 +5,7 @@
 exports.siteConfig = {
   // --------------------------------------
   // Translations should replace these lines:
-  languageCode: 'en',
+  languageCode: 'uk',
   hasLegacySite: true,
   // --------------------------------------
   copyright: `Copyright © ${new Date().getFullYear()} Facebook Inc. All Rights Reserved.`,