Update CHANGELOG.md for 8.13.10
Update CHANGELOG.md for 8.13.10

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