docs: update the demo link of kontent.ai (#73250)

## Summary

Follow up #45260.
Update Kontent.ai brand name and demo link.

### Improving Documentation

- [x] Run `pnpm prettier-fix` to fix formatting issues before opening
the PR.
- [x] Read the Docs Contribution Guide to ensure your contribution
follows the docs guidelines:
https://nextjs.org/docs/community/contribution-guide

Co-authored-by: Delba de Oliveira <32464864+delbaoliveira@users.noreply.github.com>

docs/02-pages/02-building-your-application/02-rendering/02-static-site-generation.mdx

@@ -20,7 +20,7 @@ description: Use Static Site Generation (SSG) to pre-render pages at build time.
 - [ButterCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-buttercms) ([Demo](https://next-blog-buttercms.vercel.app/))
 - [Storyblok Example](https://github.com/vercel/next.js/tree/canary/examples/cms-storyblok) ([Demo](https://next-blog-storyblok.vercel.app/))
 - [GraphCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-graphcms) ([Demo](https://next-blog-graphcms.vercel.app/))
-- [Kontent Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent.vercel.app/))
+- [Kontent.ai Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent-ai.vercel.app/))
 - [Builder.io Example](https://github.com/vercel/next.js/tree/canary/examples/cms-builder-io) ([Demo](https://cms-builder-io.vercel.app/))
 - [TinaCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-tina) ([Demo](https://cms-tina-example.vercel.app/))
 - [Static Tweet (Demo)](https://react-tweet.vercel.app/)

docs/02-pages/02-building-your-application/03-data-fetching/index.mdx

@@ -21,6 +21,6 @@ Data fetching in Next.js allows you to render your content in different ways, de
 - [ButterCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-buttercms) ([Demo](https://next-blog-buttercms.vercel.app/))
 - [Storyblok Example](https://github.com/vercel/next.js/tree/canary/examples/cms-storyblok) ([Demo](https://next-blog-storyblok.vercel.app/))
 - [GraphCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-graphcms) ([Demo](https://next-blog-graphcms.vercel.app/))
-- [Kontent Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent.vercel.app/))
-- [Static Tweet Demo](https://react-tweet.vercel.app/)
+- [Kontent.ai Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent-ai.vercel.app/))
+- [Static Tweet Demo](https://static-tweet.vercel.app/)
 - [Enterspeed Example](https://github.com/vercel/next.js/tree/canary/examples/cms-enterspeed) ([Demo](https://next-blog-demo.enterspeed.com/))

docs/02-pages/02-building-your-application/06-configuring/13-preview-mode.mdx

@@ -21,7 +21,7 @@ description: Next.js has the preview mode for statically generated pages. You ca
 - [ButterCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-buttercms) ([Demo](https://next-blog-buttercms.vercel.app/))
 - [Storyblok Example](https://github.com/vercel/next.js/tree/canary/examples/cms-storyblok) ([Demo](https://next-blog-storyblok.vercel.app/))
 - [GraphCMS Example](https://github.com/vercel/next.js/tree/canary/examples/cms-graphcms) ([Demo](https://next-blog-graphcms.vercel.app/))
-- [Kontent Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent.vercel.app//))
+- [Kontent.ai Example](https://github.com/vercel/next.js/tree/canary/examples/cms-kontent-ai) ([Demo](https://next-blog-kontent-ai.vercel.app/))
 - [Umbraco Heartcore Example](https://github.com/vercel/next.js/tree/canary/examples/cms-umbraco-heartcore) ([Demo](https://next-blog-umbraco-heartcore.vercel.app/))
 - [Plasmic Example](https://github.com/vercel/next.js/tree/canary/examples/cms-plasmic) ([Demo](https://nextjs-plasmic-example.vercel.app/))
 - [Enterspeed Example](https://github.com/vercel/next.js/tree/canary/examples/cms-enterspeed) ([Demo](https://next-blog-demo.enterspeed.com/))