#24 Fix demo link in README.md

Author: maiobarbero

README.md

@@ -10,7 +10,7 @@ If you find Astro Academia useful or appreciate my work, consider supporting me!
 <a href="https://www.producthunt.com/products/astro-academia?embed=true&utm_source=badge-featured&utm_medium=badge&utm_source=badge-astro&#0045;academia" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=1026976&theme=light&t=1760776422941" alt="Astro&#0032;Academia - Academic&#0032;website&#0032;template | Product Hunt" style="width: 189px; height: 41px;" width="189" height="41" /></a>
 
 ### Demo
-You can see Astro Academia at the following link: <a href="[https://www.markdownguide.org](https://maiobarbero.github.io/astro_academia/)" target="_blank">demo page</a>
+You can see Astro Academia at the following link: <a href="https://maiobarbero.github.io/astro_academia/" target="_blank">demo page</a>
 
 ## How to use it