Revert "Downgrade to util-linux v2.36 to workaround kernel bug"

The mentioned bug has been fixed in v5.14-rc1 and backported to the
stable kernels: 5.13.2, 5.12.17 and 5.10.50.

The newest archiso (shipped today) ships with 5.13.6.


Fix #139

This reverts commit 316d0523.
6 jobs for util-linux-downgrade-revert in 22 minutes and 48 seconds (queued for 9 seconds)