Fix url

_layouts/default.html

@@ -37,7 +37,7 @@ <h1>{{ site.title | default: site.github.repository_name }}</h1>
         {% endif %}
 
         <div style="color:#721c24;background-color:#f8d7da;border-color:#f5c6cb;padding:.75rem 1.25rem;border-radius:.25rem;margin-bottom:1rem">
-          <p><b>This project is no longer under active development.</b> You can read more <a href="/parts/part15.html">here</a>. But if you'd like to keep learning how to make your own SQLite clone from scratch, or one of many other projects like Docker, Redis, Git or BitTorrent, try <a href="https://app.codecrafters.io/join?via=cstack"><b>CodeCrafters</b></a>.</p>
+          <p><b>This project is no longer under active development.</b> You can read more <a href="{{site.baseurl}}/parts/part15.html">here</a>. But if you'd like to keep learning how to make your own SQLite clone from scratch, or one of many other projects like Docker, Redis, Git or BitTorrent, try <a href="https://app.codecrafters.io/join?via=cstack"><b>CodeCrafters</b></a>.</p>
         </div>
         <div>
           <a href="https://app.codecrafters.io/join?via=cstack"><img src="{{site.url}}{{site.baseurl}}/assets/images/code-crafters.jpeg" alt="{{ include.description }}"/></a>