fix test title (#9870)

Author: vicb

fixtures/workers-with-assets-static-routing/test/index.test.ts

@@ -42,7 +42,7 @@ describe("[Workers + Assets] static routing", () => {
 			);
 		});
 
-		it("should serve an asset when a negative run_worker_first rule matches", async ({
+		it("should serve a 404 when a negative run_worker_first rule matches", async ({
 			expect,
 		}) => {
 			let response = await fetch(`http://${ip}:${port}/missing-asset`);