Fix Catalyst demo link

Author: reinink

src/pages/blog/2024-05-24-catalyst-application-layouts/index.mdx

@@ -21,7 +21,7 @@ We just published the first major update to [Catalyst](https://tailwindui.com/te
 
 We're also pumped to share that with the release of [Headless UI v2.0 for React](/blog/headless-ui-v2), Catalyst is no longer in development preview — **it's officially stable** and you can start using it in production today without worrying about breaking changes in the underlying dependencies.
 
-Check out our brand new [live demo site](https://catalyst.tailwindui.com/demo) to see what a full Catalyst project looks and feels like after these updates for yourself.
+Check out our brand new [live demo site](https://catalyst-demo.tailwindui.com) to see what a full Catalyst project looks and feels like after these updates for yourself.
 
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@@ -251,4 +251,4 @@ Check out the [Divider](https://catalyst.tailwindui.com/docs/divider) documentat
 
 Catalyst is included with your Tailwind UI all-access license at no additional cost, so if you've got a license, log in and [download the latest version](https://tailwindui.com/templates/catalyst) to start building.
 
-Looking forward to seeing what you do with it!
+Looking forward to seeing what you do with it!