Update CHANGELOG.md for 11.0.6
Update CHANGELOG.md for 11.0.6

[ci skip]
iiet/iiet-git,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,dreampet/gitlab,iiet/iiet-git,iiet/iiet-git,jirutka/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq