Fix typo

Change-Id: Ie2e3cfa3c35f5ccb59420afb13f5142ecdcb659e
Reviewed-on: https://gerrit.libreoffice.org/7033
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>