Update CHANGELOG.md for 11.11.8
Update CHANGELOG.md for 11.11.8

[ci skip]
mmkassem/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq