[FIX] website_slides: fix course_member tour rating step

The last step of the 'course_member' test tour adds a new rating on the course.
This commit improves the test by actually checking the rating is added.

At the same time, we fix a potential build error caused by the fact that the test was closed
potentially before finishing the rating request.

Task#2091810

closes odoo/odoo#39393

X-original-commit: e26e99fae06d49f83ed2bfc9927dc60ec1af3b83
Signed-off-by: awa-odoo <awa-odoo@users.noreply.github.com>

addons/website_slides/tests/tours/slides_course_member.js

@@ -130,6 +130,11 @@ tour.register('course_member', {
 }, {
     trigger: 'button.o_portal_chatter_composer_btn',
     in_modal: false,
+}, {
+    trigger: 'a[id="review-tab"]'
+}, {
+    trigger: '.o_portal_chatter_message:contains("This is a great course. Top !")',
+    run: function () {}, // check review is correctly added
 }
 ]);