Resolves: fdo#73138 undo name for 'Chi Squared' is different

Change-Id: Iedb01a2bd08f56befb351d00cebd0fb20b57def4
Reviewed-on: https://gerrit.libreoffice.org/7231
Reviewed-by: Joren De Cuyper <jorendc@libreoffice.org>
Reviewed-by: Winfried Donkers <winfrieddonkers@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>