use the tasks signal (#1544)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: different-error

src/routes/solid-router/(3)data-fetching/(2)revalidation.mdx

@@ -53,7 +53,7 @@ function Project(props: { id: string }) {
 	return (
 		<div>
 			<button onClick={refetchTasks}>Refetch tasks for this project</button>
-			<For each={project.tasks}>{(task) => <div>{task.title}</div>}</For>
+			<For each={tasks()}>{(task) => <div>{task.title}</div>}</For>
 		</div>
 	);
 }