Update install/index.html

install/index.html

@@ -1394,7 +1394,7 @@
     (async function loadUpdates() {
       const container = document.getElementById('updatesList');
       try {
-        const res = await fetch('/updates.json?v=' + Date.now());
+        const res = await fetch('./updates.json?v=' + Date.now());
         if (!res.ok) throw new Error('Failed to load');
         const updates = await res.json();