Merge branch '31263-fix-fenced-code-misalignment-with-activity' into 'master'

Fix fenced code block misalignment in events/activity

Closes #31263

See merge request !12149

app/assets/stylesheets/pages/events.scss

@@ -89,7 +89,6 @@
         background: $gray-light;
         border-radius: 0;
         color: $events-pre-color;
-        margin: 0 20px;
         overflow: hidden;
       }