Add Pixi back into the list on the site

Author: ipmb

site/index.html

@@ -111,9 +111,9 @@ <h2>Package Managers</h2>
       <li>
         <a href="https://pipenv.pypa.io/"><code>pipenv</code></a>
       </li>
-      <!-- <li>
-        <a href="https://pixi.sh/latest/"><code>pixi</code></a>
-      </li> -->
+      <li>
+        <a href="https://pixi.prefix.dev/latest/"><code>pixi</code></a>
+      </li>
       <li>
         <a href="https://python-poetry.org/"><code>poetry</code></a>
       </li>