test: align created_at reason expectation

Author: Priyanshubhartistm

test/unit/handlers/event-message-handler.spec.ts

@@ -293,7 +293,7 @@ describe('EventMessageHandler', () => {
 
           expect(
             (handler as any).canAcceptEvent(event)
-          ).to.equal('invalid: created_at is more than 100 seconds in the future')
+          ).to.equal('rejected: created_at is more than 100 seconds in the future')
         })
       })