Styling not applied to Umami search form

Problem/Motivation

Before Drupal 11.4, block content attributes were moved from the content to the block. Now that this has been fixed, the search-block-form class is on the search form instead of being on the block div. The search form styling no longer applies.

Before

After

Steps to reproduce

1. Start the Umami demo from Drupal 11.3.
2. Update to Drupal 11.4.
3. Look at the search block in the header.

Proposed resolution

Change the style selector.