[TASK] Set TYPO3 version to 11.3.4-dev

Change-Id: I877dc31a0588bf52f65604e4041149133f1c16d1
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70638
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
72 jobs for 11.3 in 7 minutes and 48 seconds (queued for 7 seconds)