#699: Add missing information to javadoc of ItemFlag#HIDE_POTION_EFFECTS

By: SkytAsul <skytasul@gmail.com>

paper-api/src/main/java/org/bukkit/inventory/ItemFlag.java

@@ -26,7 +26,8 @@ public enum ItemFlag {
      */
     HIDE_PLACED_ON,
     /**
-     * Setting to show/hide potion effects on this ItemStack
+     * Setting to show/hide potion effects, book and firework information, map
+     * tooltips, and enchantments of enchanted books.
      */
     HIDE_POTION_EFFECTS,
     /**