Add a blank line preceding a Markdown-formatted ordered list in the DocBlock for the admin_body_class filter.

Props kpdesign.
See #30558.


git-svn-id: https://develop.svn.wordpress.org/trunk@30756 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/admin-header.php

@@ -166,6 +166,7 @@ $admin_body_class .= ' no-customize-support no-svg';
  *
  * This filter differs from the {@see 'post_class'} and {@see 'body_class'} filters
  * in two important ways:
+ *
  * 1. `$classes` is a space-separated string of class names instead of an array.
  * 2. Not all core admin classes are filterable, notably: wp-admin, wp-core-ui,
  *    and no-js cannot be removed.