[BUGFIX] Require symfony/finder 4.3

The bugfix for #88883 makes use of natural sorting via Symfony's Finder
component. Since TYPO3 depends on version 4.1, this won't work since the
feature was introdcuced in version 4.2.

This patch updates symfony/finder to version 4.3.

Executed composer command:

  composer require symfony/finder:^4.3

Resolves: #88953
Related: #88883
Releases: master
Change-Id: Ia4c3b246153d763f640de3dc1deeed6b40c601f4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61491


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Susanne Moog <look@susi.dev>