Added RegainReason.SATIATED.

This reason is used when a player regains health from generating due to their hunger being satisfied.

By: EvilSeph <evilseph@gmail.com>

paper-api/src/main/java/org/bukkit/event/entity/EntityRegainHealthEvent.java

@@ -63,6 +63,10 @@ public class EntityRegainHealthEvent extends EntityEvent implements Cancellable
          * When a player regains health from regenerating due to Peaceful mode (difficulty=0)
          */
         REGEN,
+        /**
+         * When a player regains health from regenerating due to their hunger being satisfied
+         */
+        SATIATED,
         /**
          * When a player regains health from eating consumables
          */