Hello, I'm trying to use the github action for previews. I would like to have it run as an equivalent to

pulumi preview --refresh

where any changes caused by the refresh become part of the preview. The only option I found so far is the

refresh: true

option, which commits the changes to stack state before running the preview. The thing is, I don't want my pull requests to change the state of the stack, I just want to be notified of the drift. Is there any option to do this?