feat: re-enable Security shortcut in the user menu

Restore openSecurity to isAuthenticated (master's behaviour) so the
Security quick-link reappears in the user menu, consistent with the
re-enabled Security settings tab.

apps/web/test/viewmodels/menus/__snapshots__/UserMenuViewModel-test.ts.snap

@@ -28,7 +28,7 @@ exports[`UserMenuViewModel should generate a menu options for a logged in client
     "linkNewDevice": true,
     "openFeedback": false,
     "openHomePage": false,
-    "openSecurity": false,
+    "openSecurity": true,
     "openSettings": true,
     "signIn": false,
   },