Merge pull request #27306 from overleaf/dp-uppercase-collaborator-icons

Use uppercase characters for collaborator icons in new editor

GitOrigin-RevId: 185a4d8b26f490f78103af96a556a7227bde7121

services/web/frontend/stylesheets/bootstrap-5/pages/editor/online-users.scss

@@ -123,6 +123,7 @@
       var(--online-users-border-color);
     box-sizing: border-box;
     display: inline-block;
+    text-transform: uppercase;
   }
 
   .online-user-circle-light-font {