Specify when loottable is removed for replenished

If auto replenished is enabled, stationary containers can be re-looted.
When broken, usually by players, the loot is unpacked and the loottable
is destroyed.

The commit expands the wording to also cover shulker boxes, which work a
bit differently. In case a player breaks them, they are immediately
looted and loose their replenishment ability. In case of a piston
breaking them, they cannot unpack their loot table as no player exists
in the context, so they only loose their loot table if they have been
looted once before.

Author: lynxplay

config-specs/paper/paper-world-defaults.yml

@@ -827,7 +827,8 @@ lootables:
     description: >-
       Instructs the server to automatically replenish lootable containers. This
       feature is useful for long-term worlds in which players are not expected
-      to constantly explore to generate new chunks
+      to constantly explore to generate new chunks. Breaking such lootable containers
+      disables replenishing after their initial looting.
   max-refills:
     default: "-1"
     description: >-