Docs: remove mentions of fdformat from util-linux

Since util-linux commit 13b26e3c36d1
("fdformat: remove command from default build")
the fdformat tool is not built anymore by default.
As a result it is not packaged anymore by distributions and therefore
not usable by users.

Instead mention the "mount" command as more likely to be present
alternative.

Also drop the reference to fdformat from the list of features of new
versions of util-linux.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20231220-docs-fdformat-v1-1-0d05279e5d83@weissschuh.net

Documentation/process/changes.rst

@@ -39,7 +39,7 @@ binutils               2.25             ld -v
 flex                   2.5.35           flex --version
 bison                  2.0              bison --version
 pahole                 1.16             pahole --version
-util-linux             2.10o            fdformat --version
+util-linux             2.10o            mount --version
 kmod                   13               depmod -V
 e2fsprogs              1.41.4           e2fsck -V
 jfsutils               1.1.3            fsck.jfs -V
@@ -213,7 +213,7 @@ Util-linux
 
 New versions of util-linux provide ``fdisk`` support for larger disks,
 support new options to mount, recognize more supported partition
-types, have a fdformat which works with 2.4 kernels, and similar goodies.
+types, and similar goodies.
 You'll probably want to upgrade.
 
 Ksymoops