LU-10516 doc: recommend e2fsprogs 1.42.13.wc6

LU-10516 doc: recommend e2fsprogs 1.42.13.wc6

Update the recommended e2fsprogs version to 1.42.13.wc6 in
lustre/ChangeLog as this has been released for some time already.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Id4663e02849675f1c8a4b9c13e191ed9d735ab56
Reviewed-on: https://review.whamcloud.com/30871
Reviewed-by: Peter Jones <peter.a.jones@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>