[FIX] website_event_track_online: set overflow-x to auto in event agenda

In order to see the overflow-x scrollbar only when needed, overflow-x have been
set to auto instead of scroll for agenda table.

Task ID: 2314778

closes odoo/odoo#56368

X-original-commit: ec189b25230177946bca8fb2b020fb168b425c5f
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/website_event_track/static/src/scss/event_track_templates.scss

@@ -26,7 +26,7 @@
  * AGENDA
  */
 .o_we_online_agenda {
-    overflow-x: scroll;
+    overflow-x: auto;
 
     table {
         border-collapse: separate;