Update CHANGELOG for 8.8.1. Again.
Update CHANGELOG for 8.8.1. Again.

[ci skip]

shinexiao/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,htve/GitlabForChinese,mmkassem/gitlabhq,mr-dxdy/gitlabhq,LUMC/gitlabhq,darkrasid/gitlabhq,allysonbarros/gitlabhq,stoplightio/gitlabhq,allysonbarros/gitlabhq,dreampet/gitlab,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,dreampet/gitlab,openwide-java/gitlabhq,screenpages/gitlabhq,iiet/iiet-git,iiet/iiet-git,iiet/iiet-git,screenpages/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,screenpages/gitlabhq,darkrasid/gitlabhq,mmkassem/gitlabhq,mr-dxdy/gitlabhq,daiyu/gitlab-zh,htve/GitlabForChinese,mmkassem/gitlabhq,daiyu/gitlab-zh,jirutka/gitlabhq,daiyu/gitlab-zh,Soullivaneuh/gitlabhq,SVArago/gitlabhq,axilleas/gitlabhq,daiyu/gitlab-zh,htve/GitlabForChinese,iiet/iiet-git,dplarson/gitlabhq,stoplightio/gitlabhq,icedwater/gitlabhq,dplarson/gitlabhq,martijnvermaat/gitlabhq,mr-dxdy/gitlabhq,icedwater/gitlabhq,screenpages/gitlabhq,dplarson/gitlabhq,mr-dxdy/gitlabhq,icedwater/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,LUMC/gitlabhq,jirutka/gitlabhq,Soullivaneuh/gitlabhq,martijnvermaat/gitlabhq,openwide-java/gitlabhq,allysonbarros/gitlabhq,openwide-java/gitlabhq,openwide-java/gitlabhq,SVArago/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,martijnvermaat/gitlabhq,Soullivaneuh/gitlabhq,dreampet/gitlab,darkrasid/gitlabhq,shinexiao/gitlabhq,t-zuehlsdorff/gitlabhq,allysonbarros/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,shinexiao/gitlabhq,jirutka/gitlabhq,shinexiao/gitlabhq,Soullivaneuh/gitlabhq,SVArago/gitlabhq,martijnvermaat/gitlabhq,LUMC/gitlabhq