SPIGOT-6656: CauldronLevelChangeEvent is not fired correctly when dripstone fills the cauldron

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

paper-api/src/main/java/org/bukkit/event/block/CauldronLevelChangeEvent.java

@@ -157,7 +157,7 @@ public class CauldronLevelChangeEvent extends BlockEvent implements Cancellable
          */
         EVAPORATE,
         /**
-         * Filling due to natural fluid sources, eg rain.
+         * Filling due to natural fluid sources, eg rain or dripstone.
          */
         NATURAL_FILL,
         /**