This commit fixes the "End Course" button displayed after successfully passing
a quizz. Before this commit, the button didn't do anything, now, it redirects
to the slides homepage.

ommit linked to task ID 1978530 (fixes linked to internal testing).

closes odoo/odoo#33133

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