Add 8.4.6 and 8.4.7 CHANGELOG items
Add 8.4.6 and 8.4.7 CHANGELOG items

[ci skip]

Signed-off-by: Rémy Coutable <4ea0184b9df19e0786dd00b28e6daa4d26baeb3e@rymai.me>

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