Update README.md and actions

[raynamharris]

minor updates to the readme

[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

[raynamharris]

okay, my attempts to tag the "trainers" team as reviewers doesn't work. so sad. will update now.