Rollup merge of #100804 - GuillaumeGomez:search-results-color-ayu, r=notriddle

Fix search results color on hover for ayu theme

Before:

![image](https://user-images.githubusercontent.com/3050060/185747851-038d2333-8b01-44a8-a104-ceb7410ac089.png)

After:

![image](https://user-images.githubusercontent.com/3050060/185747869-53b502f5-5800-470f-b897-2683f1cdb7ee.png)

You can test it [here](https://rustdoc.crud.net/imperio/search-results-color-ayu/foo/index.html?search=item).

r? ``@jsha``

Author: JohnTitor