imply slay_the_spire_2 -> slay_the_spire

BUR #56650 has been approved by @nonamethanks.

create implication slay_the_spire_2 -> slay_the_spire

Sequel that introduces new characters, items, etc.

Do we need a tag for the first game? Probably not since it's a direct sequel.

The bulk update request #56650 (forum #425015) has been approved by @nonamethanks.