Added support for Spigot 1.21.3

To look up another player's vaults, you now must run /pv <playername> list

If a staff member with permission to view other player's vaults tries to look up a vault of their own that doesn't exist, it used to result in looking up that ID as a potential player, for listing their vaults. This would cause unnecessary performance issues. Moving the command is an easy resolution to this issue.