[FIX] website_slides: can join a course in a quiz preview

PURPOSE

Fix a bug where you get a traceback when trying to join a course on a quiz
preview not in fullscreen mode.

A variable was badly named in JS (id -> channelId), leading to the ID not
being forwarded to the "Join Course" sub-widget.

LINKS

Task ID 2079476
PR #38051

closes odoo/odoo#39891

X-original-commit: b32d30b8cde85ba37f9cef975838874a08ea7c07
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/website_slides/static/src/js/slides_course_quiz.js

@@ -422,7 +422,7 @@ odoo.define('website_slides.quiz', function (require) {
 
         _extractChannelData: function (slideData){
             return {
-                id: slideData.channelId,
+                channelId: slideData.channelId,
                 channelEnroll: slideData.channelEnroll,
                 signupAllowed: slideData.signupAllowed
             };