Add King of Hanzhong council milestone

src/game/state/campaignState.ts

@@ -115,7 +115,8 @@ export type CampaignStep =
   | 'thirty-sixth-battle'
   | 'thirty-sixth-camp'
   | 'thirty-seventh-battle'
-  | 'thirty-seventh-camp';
+  | 'thirty-seventh-camp'
+  | 'hanzhong-king-camp';
 
 export type CampaignUnitProgressSnapshot = {
   unitId: string;