New azure-cli requires --overwrite to replace canary

 See https://github.com/helm/helm/issues/10724.

The latest main build fails with:
```
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.
```