meson: Drop required libfdisk version to 2.32

We initially pinned this to 2.33 in
e71f5585 because libfdisk 2.32 in
CentOS 8 didn't have
https://github.com/karelzak/util-linux/commit/2f35c1ead621f42f32f7777232568cb03185b473
backported.

If we check now, we can see it has been backported
(https://git.centos.org/rpms/util-linux/blob/c8s/f/SOURCES/0048-libfdisk-count-gaps-to-possible-size-when-resize.patch)
which means we can drop the required version to 2.32 instead of 2.33.