Add v3.8.1-20231213 to CHANGELOG.md

Merge pull request #67 from StackStorm/release/changelog

Update the Changelog.md for a v3.8.0-20230127 release

Creating tag v3.8.0-20221126 for branch master

Creating tag v3.7.0-20220506 for branch master

Creating tag v3.6.0-20211122 for branch master

Creating tag v3.5.0-20210628 for branch master

Creating tag v3.4.1-20210314 for branch master

Merge pull request #60 from StackStorm/update-changelog-for-v3.4

Update changelog for v3.4 release

Merge pull request #52 from StackStorm/hotfix/postgres-cleanup

Remove postgres stop from cleanup step, no longer needed since mistral is gone

Creating tag v3.2.0-20200429 for branch master