v1.101.0-rc.2 is a pre-release. It is to help gather feedback from the community and give users a chance to test Kubecost before v1.101.0 is officially released.
After taking v1.101.0-rc.2 for a test drive, if you have any feedback, it would be great if you could open an issue here https://github.com/kubecost/cost-analyzer-helm-chart/issues/new/choose.
The official change log will come out with the v1.101 release. The estimated release date is Wednesday, March 8th.