Fix incorrect Interval.End documentation left over from 1.x.
Fix incorrect Interval.End documentation left over from 1.x.

zaccharles/nodatime,nodatime/nodatime,nodatime/nodatime,zaccharles/nodatime,jskeet/nodatime,zaccharles/nodatime,zaccharles/nodatime,BenJenkinson/nodatime,malcolmr/nodatime,malcolmr/nodatime,jskeet/nodatime,zaccharles/nodatime,malcolmr/nodatime,BenJenkinson/nodatime,malcolmr/nodatime,zaccharles/nodatime