[FIX] website_slides_forum: add link to "home" forum

This commit adds a link to go to the "home" forum to "Forum" tab in question
page.

Task 2026846

addons/website_slides_forum/views/website_slides_forum_templates.xml

@@ -12,7 +12,7 @@
                                     <i class="fa fa-home"/> Course</a>
                             </li>
                             <li class="nav-item">
-                                <a href="#" t-att-class="'nav-link active o_wprofile_navlink'" style="border-left: 0px">Forum</a>
+                                <a t-att-href="'/forum/%s' % (slug(forum))" t-att-class="'nav-link active o_wprofile_navlink'" style="border-left: 0px">Forum</a>
                             </li>
                             <li class="nav-item">
                                 <a t-att-href="'/slides/%s?active_tab=review' % (slug(forum.slide_channel_id))"