refactor: name webhook controller handler

packages/backend/src/routes/webhooks.ts

@@ -1,8 +1,8 @@
-import createAction from '../controllers/webhooks/create';
 import { Router } from 'express';
+import webhookHandler from '../controllers/webhooks/handler';
 
 const router = Router();
 
-router.post('/:flowId', createAction);
+router.post('/:flowId', webhookHandler);
 
 export default router;