CHANGELOG.md has not been updated for v8.0.0

[maxb]

https://github.com/actions/stale/blob/main/CHANGELOG.md has not been updated for release v8.0.0.

Either it should be updated, or if the project has taken a decision to provide change details only in GitHub releases descriptions, a header should be added to the changelog communicating that.

[dsame]

Hello @maxb, thanks for the input, we will start to investigate the issue soon.