Fixing Tina + Adding a demo URL (#35480)

## Documentation / Examples

- Updating Tina Demo URL
- Adding Tina to blog-starter example
- Adding Tina to Basic features section
- Updating Tina to actually work again

docs/basic-features/pages.md

@@ -64,6 +64,7 @@ You can also use **Client-side Rendering** along with Static Generation or Serve
     <li><a href="https://github.com/vercel/next.js/tree/canary/examples/cms-graphcms">GraphCMS Example</a> (<a href="https://next-blog-graphcms.vercel.app/">Demo</a>)</li>
     <li><a href="https://github.com/vercel/next.js/tree/canary/examples/cms-kontent">Kontent Example</a> (<a href="https://next-blog-kontent.vercel.app/">Demo</a>)</li>
     <li><a href="https://github.com/vercel/next.js/tree/canary/examples/cms-builder-io">Builder.io Example</a> (<a href="https://cms-builder-io.vercel.app/">Demo</a>)</li>
+    <li><a href="https://github.com/vercel/next.js/tree/canary/examples/cms-tina">TinaCMS Example</a> (<a href="https://cms-tina-example.vercel.app/">Demo</a>)</li>
     <li><a href="https://static-tweet.vercel.app/">Static Tweet (Demo)</a></li>
   </ul>
 </details>

examples/blog-starter/README.md

@@ -33,6 +33,7 @@ Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_mediu
 - [Kontent](/examples/cms-kontent)
 - [Umbraco Heartcore](/examples/cms-umbraco-heartcore)
 - [Builder.io](/examples/cms-builder-io)
+- [TinaCMS](/examples/cms-tina/)
 
 ## How to use