Add changelog of v1.9.1 (#7859) (#7866)
Add changelog of v1.9.1 (#7859) (#7866)

* add changelog of v1.9.1

* Update CHANGELOG.md

Co-Authored-By: Lauris BH <f3041c4c693c07149804ea655e75ee8bb856bd26@nix.lv>

* mention releases build by go1.12.8

* Update CHANGELOG.md

Co-Authored-By: Lauris BH <f3041c4c693c07149804ea655e75ee8bb856bd26@nix.lv>
vCaesar/gitea,kubatyszko/gitea,sapk-fork/gitea,typeless/gitea,lafriks/gitea,cez81/gitea,go-gitea/gitea,vdbt/gitea,vdbt/gitea,sapk-fork/gitea,sapk-fork/gitea,typeless/gitea,sapk-fork/gitea,cez81/gitea,cez81/gitea,vCaesar/gitea,lafriks/gitea,lafriks/gitea,kubatyszko/gitea,go-gitea/gitea,typeless/gitea,go-gitea/gitea,typeless/gitea,kubatyszko/gitea