Use JDK19+ compatible constructor for Locale

Author: ddworak

guide/backend/src/main/scala/io/udash/web/guide/demos/i18n/TranslationServer.scala

@@ -1,15 +1,15 @@
 package io.udash.web.guide.demos.i18n
 
-import java.{util => ju}
-
-import io.udash.web.Implicits._
 import io.udash.i18n.{Lang, ResourceBundlesTranslationTemplatesProvider, TranslationRPCEndpoint}
+import io.udash.web.Implicits.*
+
+import java.util as ju
 
 class TranslationServer extends TranslationRPCEndpoint(
   new ResourceBundlesTranslationTemplatesProvider(
     TranslationServer.langs
       .map(lang =>
-        Lang(lang) -> TranslationServer.bundlesNames.map(name => ju.ResourceBundle.getBundle(name, new ju.Locale(lang)))
+        Lang(lang) -> TranslationServer.bundlesNames.map(name => ju.ResourceBundle.getBundle(name, new ju.Locale.Builder().setLanguage(lang).build()))
       ).toMap
   )
 )