update test

packages/svelte/tests/runtime-runes/samples/async-reactivity-loss/_config.js

@@ -12,6 +12,13 @@ export default test({
 		await tick();
 		assert.htmlEqual(target.innerHTML, '<button>a</button><button>b</button><h1>3</h1>');
 
-		assert.deepEqual(warnings, ['Detected reactivity loss']);
+		assert.equal(
+			warnings[0],
+			'Detected reactivity loss when reading `b`. This happens when state is read in an async function after an earlier `await`'
+		);
+
+		assert.equal(warnings[1].name, 'TracedAtError');
+
+		assert.equal(warnings.length, 2);
 	}
 });