Add v1.8.1 entry to CHANGELOG
Add v1.8.1 entry to CHANGELOG

[ci skip]

soiff/gitlab-ci-multi-runner,soiff/gitlab-ci-multi-runner,soiff/gitlab-ci-multi-runner,hu19891110/gitlab-ci-multi-runner,hu19891110/gitlab-ci-multi-runner,hu19891110/gitlab-ci-multi-runner