Merge pull request #25540 from overleaf/jdt-push-assist-interstitial-higher-z-index

Fix assist promotion being hidden under error logs pane

GitOrigin-RevId: 715d82ddd98ce5e15ce2e42935526387b4c6fa1b

services/web/frontend/stylesheets/bootstrap-5/modules/writefull.scss

@@ -12,7 +12,7 @@
 }
 
 .feature-rebrand-promo-container {
-  z-index: 1;
+  z-index: 12;
   position: absolute;
   bottom: 15px;
   right: 15px;