SPIGOT-6641: Use varargs in sendMessage

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -845,7 +845,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     }
 
     @Override
-    public void sendMessage(String[] messages) {
+    public void sendMessage(String... messages) {
 
     }
 
@@ -855,7 +855,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     }
 
     @Override
-    public void sendMessage(UUID sender, String[] messages) {
+    public void sendMessage(UUID sender, String... messages) {
         this.sendMessage(messages); // Most entities don't know about senders
     }