DR-6514-add-image-to-linktree-saas-youtube-guide (#7381)

* update guide cover

* Optimised images with calibre/image-actions

---------

Co-authored-by: Arthur Gamby <[email protected]>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: 3 people

content/900-ai/tutorials/linktree-clone.mdx

@@ -3,7 +3,7 @@ title: 'Vibe Code a Linktree Clone SaaS with Next.js, Prisma & Clerk'
 metaTitle: 'Build a Linktree Clone SaaS with Next.js, Prisma Postgres, and Clerk Auth'
 description: 'A complete vibe coding tutorial: build a full Linktree clone SaaS application from scratch using Next.js, Prisma ORM, Prisma Postgres, and Clerk authentication with AI assistance.'
 sidebar_label: 'Linktree Clone (SaaS)'
-image: '/img/guides/prisma-linktree-saas-cover.png'
+image: '/img/guides/guide-ai-how-to-create-a-linktree-saas-cover.png'
 completion_time: '45 min'
 community_section: true
 toc_max_heading_level: 3