Update auto_assign_dev.yml

[raynamharris]

this PR will just change who gets autoassigned to review PRs to dev (fixed stable earlier with https://github.com/nih-cfde/training-and-engagement/pull/524

[github-actions[bot]]

Reviewer Checklist

• [ ] spelling and grammar
• [ ] successful run of all installation and code chunks
• [ ] sufficient explanation and details for the tutorial content
• [ ] code syntax and naming convention
• [ ] adherence of tutorial format to style guide
• [ ] functional links (inter and intra)
• [ ] accessible hyperlink text