Fix broken link in index. (#2762)

Signed-off-by: merobi-hub <merobi@gmail.com>

docs/v2/src/pages/index.tsx

@@ -23,7 +23,7 @@ function HomepageHeader() {
                         <div className={styles.buttons}>
                             <Link
                                 className="button button--secondary button--md"
-                                href="https://github.com/MarquezProject/marquez">
+                                href="/docs/quickstart">
                                 Quickstart
                             </Link>
                             <Link