[REF] website_twitter: adapt code after jQuery update

Part of task 1896658

Co-authored-by: Aaron Bohy <aab@odoo.com>
Co-authored-by: Christophe Matthieu <chm@odoo.com>
Co-authored-by: Mathieu Duckerts-Antoine <dam@odoo.com>
Co-authored-by: David Monjoie <dmo@odoo.com>
Co-authored-by: Martin Geubelle <mge@odoo.com>
Co-authored-by: svs-odoo <svs@odoo.com>
Co-authored-by: Vincent Schippefilt <vsc@odoo.com>

addons/website_twitter/static/src/js/website.twitter.animation.js

@@ -99,7 +99,7 @@ publicWidget.registry.twitter = publicWidget.Widget.extend({
             self._startScrolling();
         });
 
-        return $.when(this._super.apply(this, arguments), def);
+        return Promise.all([this._super.apply(this, arguments), def]);
     },
     /**
      * @override