The changelog can be found at the github release documentation https://github.com/baloise-incubator/generic-chart/releases.
Releases of the generic-chart before version 2.1.0 where hosted at https://registry.baloise.dev/chartrepo/library. All changes until 2.1.0 are documented in the Changelog of the upstream-branch https://github.com/baloise-incubator/generic-chart/blob/upstream/CHANGELOG.md