Noticed in chartmuseum test failure:

Pushing binaries to Azure
ERROR: The specified blob already exists.
...
ErrorCode:BlobAlreadyExists
If you want to overwrite the existing one, please add --overwrite in your command.

Chartmuseum copies script from Helm to upload canary artifacts.

In this script we need to add an --overwrite flag to az storage blob upload-batch:
https://github.com/helm/helm/blob/main/.circleci/deploy.sh#L49

CircleCI builds on main will fail.