Update tutorial link path on homepage

Changed the Link component's 'to' prop from '/docs/intro' to '/intro' in the homepage header to reflect the updated route structure.

Author: ericlmao

src/pages/index.js

@@ -19,7 +19,7 @@ function HomepageHeader() {
         <div className={styles.buttons}>
           <Link
             className="button button--secondary button--lg"
-            to="/docs/intro">
+            to="/intro">
             Docusaurus Tutorial - 5min ⏱️
           </Link>
         </div>