fix typo in error message
fix typo in error message

LUMC/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,dreampet/gitlab,dreampet/gitlab,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,dplarson/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,openwide-java/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,dreampet/gitlab,mmkassem/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,iiet/iiet-git,LUMC/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,iiet/iiet-git,openwide-java/gitlabhq,LUMC/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,axilleas/gitlabhq,dplarson/gitlabhq