Update manifest.version in changelog automation script

[greyscaled]

The add_clog_to_manifest script is responsible for updating manifest.json when creating a new changelog.

https://github.com/cdr/docs/blob/94ce5fde382a2967affc03c247f5a0423e14fdc1/scripts/add_clog_to_manifest.ts#L43

However, recently, we've added a new versions: [] key to manifest.json:

https://github.com/cdr/docs/blob/94ce5fde382a2967affc03c247f5a0423e14fdc1/manifest.json#L2

The script should update this array as well