Change internal i18n key of sv-SE from sv to sv-SE

src/invidious/helpers/i18n.cr

@@ -21,7 +21,7 @@ LOCALES = {
   "pt-PT" => load_locale("pt-PT"),
   "ro"    => load_locale("ro"),
   "ru"    => load_locale("ru"),
-  "sv"    => load_locale("sv-SE"),
+  "sv-SE" => load_locale("sv-SE"),
   "tr"    => load_locale("tr"),
   "uk"    => load_locale("uk"),
   "zh-CN" => load_locale("zh-CN"),