units-description.md appVersion addition does not support multiple versions (e.g. rke2-charts)

Summary

In unit-description.md, some helm charts have multiple versions, and the appVersion only reflects the last one.

related references

Continuity of #2884 (closed)

Details

For example for Calico:

Chart-version: v3.30.401, v3.31.200<br/>App-version: v3.31.2

And similarly for other rke2-charts where helm chart version may depend on Kubernetes version used.