Fix cancelling PlayerItemFrameChangeEvent (#7761)

patches/server/Add-PlayerItemFrameChangeEvent.patch

@@ -23,7 +23,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                // Paper start - call PlayerItemFrameChangeEvent
 +                if (source.getEntity() instanceof Player player) {
 +                    var event = new PlayerItemFrameChangeEvent((org.bukkit.entity.Player) player.getBukkitEntity(), (org.bukkit.entity.ItemFrame) this.getBukkitEntity(), this.getItem().asBukkitCopy(), PlayerItemFrameChangeEvent.ItemFrameChangeAction.REMOVE);
-+                    if (!event.callEvent()) return false;
++                    if (!event.callEvent()) return true; // return true here because you aren't cancelling the damage, just the change
 +                    this.setItem(ItemStack.fromBukkitCopy(event.getItemStack()), false);
 +                }
 +                // Paper end