doc: update site description

Author: trollefson

site/index.html

@@ -199,7 +199,7 @@
 
     <div class="container">
         <h1>🚢 shipit</h1>
-        <p>A git release tool built with Rust.</p>
+        <p>Shipit is a Rust CLI that automates merge request creation on your favorite platforms with optional AI-generated notes</p>
 
         <div id="smart-download" class="download-card highlight">
             <h3 id="os-label">Detecting your system...</h3>