Fix the javadoc

By: Thinkofdeath <thinkofdeath@spigotmc.org>

paper-api/src/main/java/org/bukkit/entity/Guardian.java

@@ -4,12 +4,14 @@ public interface Guardian extends Monster {
 
     /**
      * Check if the Guardian is an elder Guardian
+     * 
      * @return true if the Guardian is an Elder Guardian, false if not
      */
     public boolean isElder();
 
     /**
      * Set the Guardian to an elder Guardian or not
+     *
      * @param shouldBeElder True if this Guardian should be a elder Guardian, false if not
      */
     public void setElder(boolean shouldBeElder);