fix doc

Author: frto027

docs/docs/enums/ProceduralEffectConditionType.md

@@ -13,4 +13,4 @@ tags:
 |5 |ROOM_CLEAR {: .copyable } |  |
 |6 |ENTITY_SPAWN {: .copyable } |  |
 |7 |PICKUP_COLLECTED {: .copyable } |  |
-|8 |CHAIN {: .copyable } | trigger if previous `ProceduralEffect` is triggered (or dropped by rate). |
+|8 |CHAIN {: .copyable } | trigger if previous `ProceduralEffect` is triggered (or dropped by chance). |