havre: load update.js

ventures/havre/index.html

@@ -23,6 +23,7 @@
 <link rel="alternate" type="text/markdown" href="skill.md" title="Skill">
 <link rel="stylesheet" href="style.css">
 <script type="module" src="app.js"></script>
+<script src="update.js" defer></script>
 </head>
 <body>
 <a class="skip" href="#chat">skip to the chat</a>