[polari] app: Credit designers

[Marge Bot <marge-bot src gnome org>]

commit 7e40fcf64c90ce2fb90916342c780855151e5c9f
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jul 9 20:07:09 2022 +0200

    app: Credit designers
    
    The new Adw.AboutWindow has a predefined property for design,
    so we can finally give credit without jumping through hoops
    (or mix credits for UX and artwork).
    
    Part-of: <https://gitlab.gnome.org/GNOME/polari/-/merge_requests/256>

 src/application.js | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/application.js b/src/application.js
index a47e9fbc..39cda97a 100644
--- a/src/application.js
+++ b/src/application.js
@@ -849,6 +849,11 @@ class Application extends Adw.Application {
                 'Lapo Calamandrei <calamandrei gmail com>',
                 'Tobias Bernard <tbernard gnome org>',
             ],
+            designers: [
+                'William Jon McCann <william jon mccann gmail com>',
+                'Bastian Ilsø <bastianilso gnome org>',
+                'Allan Day <allanpday gmail com>',
+            ],
             translator_credits: _('translator-credits'),
             comments: _('An Internet Relay Chat Client for GNOME'),
             copyright: 'Copyright © 2013-2018 The Polari authors',