Fixes carousel indicator navigation

[marvinschroeder]

Adds position: relative to .carousel .carousel-indicators-navigation>li.active so that the absolute positioned element .carousel .carousel-indicators-navigation>li.active::before is shown correct.

Pull Request

Prerequisites

• [ ] Changes have been tested on TYPO3 v10.4 LTS
• [x] Changes have been tested on TYPO3 v11.5 LTS
• [ ] Changes have been tested on PHP 7.2
• [ ] Changes have been tested on PHP 7.3
• [ ] Changes have been tested on PHP 7.4
• [ ] Changes have been tested on PHP 8.0
• [x] Changes have been tested on PHP 8.1
• [x] Changes have been checked for CGL compliance php-cs-fixer fix