Fix grammer error in manual votequorum_trackstart

"allows to" was updated to read "allows one to"

• With a subject it's grammatically correct.

Change-Id: I9559e31c780e211b651744c6eaa056ce8d4c3db1
Signed-off-by: Richard B Winters <rik@mmogp.com>
Reviewed-by: Steven Dake <sdake@redhat.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>