[TASK] Release version 2.3.1

Resolves: #59667
Releases: 2.3
Change-Id: I244f42d9902bd6c57acbfcfeb814b64d92e4eaca
Reviewed-on: https://review.typo3.org/30880
Reviewed-by: Francois Suter
Tested-by: Francois Suter