... and another straggler. This means that Contao 4.12 has definitely reached EOL and all users are encouraged to update to version 4.13 LTS.
About Contao 4.12
The first stable version of Contao 4.12 was released on 15 August 2021 and is the successor of Contao 4.11. 4.12 will be updated until 14 January 2022, after which it was replaced by Contao 4.13.