Fixes Decorate Cart requirement (#5012)

* Fixes #4980.
* Decorate Cart requires a Cart be active.
Thanks to @LordWhiplash!

db/re/skill_db.yml

@@ -28372,6 +28372,7 @@ Body:
     HitCount: 1
     Requires:
       SpCost: 40
+      State: Cart
   - Id: 2552
     Name: RL_RICHS_COIN
     Description: Rich's Coin