Alias for one version back from stable

We have `stable` for the latest Racket release but would it be possible to have an alias for the version prior to `stable`. I have a GHA that runs exercise test solutions against 8.9 and 8.10 currently and I update the versions manually. Having both `stable` and `previous` (name not important) means I can always test the current version and one back without manually updating the workflow.