fix changelog entry for !8425
fix changelog entry for !8425

the author and mr fields got swapped,
see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8425#note_21021254
axilleas/gitlabhq,axilleas/gitlabhq,htve/GitlabForChinese,htve/GitlabForChinese,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,dplarson/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,t-zuehlsdorff/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,mmkassem/gitlabhq,darkrasid/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,dreampet/gitlab,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,dplarson/gitlabhq,darkrasid/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,darkrasid/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,dreampet/gitlab,iiet/iiet-git,dreampet/gitlab,jirutka/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,openwide-java/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,dplarson/gitlabhq,LUMC/gitlabhq