refactor: use variable type instead of 'var'

Author: christolis

application/src/main/java/org/togetherjava/tjbot/features/dynamicvc/DynamicVoiceListener.java

@@ -90,7 +90,7 @@ public void onVoiceUpdate(@NotNull GuildVoiceUpdateEvent event) {
     }
 
     private void insertEventToQueue(GuildVoiceUpdateEvent event, String channelTopic) {
-        var eventQueue = eventQueues.get(channelTopic);
+        Queue<GuildVoiceUpdateEvent> eventQueue = eventQueues.get(channelTopic);
 
         if (eventQueue == null) {
             return;