fix: the locales of the hard coded list of languages

LIIKUNTA-432.

Fixed the locations selected module in the article page.
Needed also to update the CMS content related to the languages (Wordpress PolyLang):
1. https://liikunta.hkih.stage.geniem.io/wp-admin/admin.php?page=mlang
2. https://liikunta2.content.api.hel.fi/wp-admin/admin.php?page=mlang

Author: nikomakela

packages/components/src/components/errorPages/ErrorPage.tsx

@@ -35,15 +35,15 @@ const HARDCODED_LANGUAGES = [
   {
     __typename: 'Language',
     id: 'TGFuZ3VhZ2U6ZW4=',
-    locale: 'en_US',
+    locale: 'en',
     name: 'English',
     code: 'EN' as LanguageCodeEnum,
     slug: 'en',
   },
   {
     __typename: 'Language',
     id: 'TGFuZ3VhZ2U6c3Y=',
-    locale: 'sv_SE',
+    locale: 'sv',
     name: 'Svenska',
     code: 'SV' as LanguageCodeEnum,
     slug: 'sv',