More Aftershock wording tweaks

subclass/Korvinagor; Circle of Upheaval.json

@@ -142,7 +142,7 @@
 					"type": "entries",
 					"name": "Aftershock",
 					"entries": [
-						"Whenever a creature within 30 feet of you starts its turn on {@quickref difficult terrain||3} or takes thunder damage, you can force it to succeed on a Dexterity saving throw against your spell save DC or fall {@condition prone}."
+						"When a creature within 30 feet of you starts its turn on {@quickref difficult terrain||3} or takes thunder damage, you can force it to succeed on a Dexterity saving throw against your spell save DC or fall {@condition prone}."
 					]
 				},
 				{