docs(briefo): update links to use markdown syntax

Author: kesku

docs/showcase/briefo.mdx

@@ -68,5 +68,5 @@ supabase functions deploy perplexity-news perplexity-chat perplexity-research po
 * Testing and Linting: ESLint, Prettier, and Expo Lint maintain code quality
 
 ## Links
-https://github.com/adamblackman/briefo-public
-https://www.briefo.fun/
+[GitHub Repository](https://github.com/adamblackman/briefo-public)
+[Live Demo](https://www.briefo.fun/)