[TASK] Release Version 1.2.1

Resolves: #58452
Releases: 6.2, 4.7, 4.5
Change-Id: I1008e64367a71df5fca22c4ca5c1e6258e0576c2
Reviewed-on: https://review.typo3.org/29801
Reviewed-by: Ralf Zimmermann
Tested-by: Ralf Zimmermann