Add rarity to set

public/data/honkai3rd/stigmata-sets/kepler.json

@@ -9,5 +9,6 @@
   "threeSetSkill": {
     "name": "Heavenly Verdict 3 Pieces",
     "description": "Critical strikes mark non-Boss enemies for Judgment. These enemies then take 15% ATK of Physical DMG per second for 30s. CD: 5s. For every enemy marked for Judgment, gain 6% Crit Rate. Stacks up to 5 times."
-  }
-}
+  },
+  "rarity": 5
+}