fix(build): update Electron 21 to latest

Address some vulnerability issues without updating the major

Author: Stanzilla

packages/shell-electron/package.json

@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "cross-spawn": "^7.0.3",
-    "electron": "^21.0.1",
+    "electron": "^21.4.4",
     "express": "^4.17.1",
     "ip": "^1.1.5",
     "socket.io": "^4.4.0",
@@ -56,4 +56,4 @@
     "README.md",
     "server.js"
   ]
-}
+}