[gnome-shell] polkitAgent: Fix a typo of a signal name

[Florian Müllner <fmuellner src gnome org>]

commit f5e179f03d03656d8a06239e253cc41030595259
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Sun Jun 23 11:40:42 2019 +0200

    polkitAgent: Fix a typo of a signal name
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/788

 js/ui/components/polkitAgent.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/components/polkitAgent.js b/js/ui/components/polkitAgent.js
index 88316b8928..03eaf7152f 100644
--- a/js/ui/components/polkitAgent.js
+++ b/js/ui/components/polkitAgent.js
@@ -52,7 +52,7 @@ var AuthenticationDialog = GObject.registerClass({
 
         this._user = AccountsService.UserManager.get_default().get_user(userName);
         let userRealName = this._user.get_real_name();
-        this._userLoadedId = this._user.connect('notify::is_loaded',
+        this._userLoadedId = this._user.connect('notify::is-loaded',
                                                 this._onUserChanged.bind(this));
         this._userChangedId = this._user.connect('changed',
                                                  this._onUserChanged.bind(this));