add v23 release notes (final N for release)

[jharenza]

Data Release Checklist

• [x] Is the table in doc/data-file-descriptions.md up to date?
• [x] Is doc/data-format.md up to date?
• [x] Is doc/release-notes.md up to date?
• [x] Is download-data.sh up to date?
• [x] Was download-data.sh tested and did it complete without error?

Adding brief release notes here. If these look good, I can add to S3.

[jharenza]

@jaclyn-taroni the release notes have been updated on S3 and download script runs successfully.

[jharenza]

🚀