Gooffiness with change detection #18

Discovered here in this build: https://github.com/emberjs/rfcs/actions/runs/4883067241/jobs/8713927566?pr=907

For some reason it is coming up as all these files have changed 
(long list of files)

A work-around is rebasing (or merging main in to the PR) -- which means that the automation here may be comparing the changes from the PR to current main rather than the PR's upstream parent