fix oopsie breaking decky on the latest beta

frontend/src/index.ts

@@ -7,7 +7,7 @@ interface Window {
 (async () => {
   // Wait for main webpack chunks to definitely be loaded
   console.time('[Decky:Boot] Waiting for main Webpack chunks...');
-  while (!window.webpackChunksteamui || window.webpackChunksteamui.length < 8) {
+  while (!window.webpackChunksteamui || window.webpackChunksteamui.length < 5) {
     await new Promise((r) => setTimeout(r, 10)); // Can't use DFL sleep here.
   }
   console.timeEnd('[Decky:Boot] Waiting for main Webpack chunks...');