[REF] *: BS5: migration

Automated change made by a lot of RegEx to change all think that is
possible to automate.

https://getbootstrap.com/docs/5.1/migration

Task ID: 2766483

Part-of: odoo/design-themes#580

theme_common/static/src/old_snippets/s_event_slide/000.scss

@@ -22,8 +22,8 @@
                 background-color: o-color('epsilon');
             }
             > .row > div {
-                border-right: 1px solid gray('200');
-                border-bottom: 1px solid gray('200');
+                border-right: 1px solid map-get($grays, '200');
+                border-bottom: 1px solid map-get($grays, '200');
                 text-align: left;
                 h4 {
                     text-align: center;