Update release notes for v2024.03.0

[anissa111]

PR Summary

Part of #585

• also fixes a small formatting issue I saw

PR Checklist

General

• Make an issue if one doesn't already exist
• Link the issue this PR resolves by adding closes #XXX to the PR description where XXX is the number of the issue.
• [n/a] Add a brief summary of changes to docs/release-notes.rst in a relevant section for the next unreleased release. Possible sections include: Documentation, New Features, Bug Fixes, Internal Changes, Breaking Changes/Deprecated
• Add appropriate labels to this PR
• Make your changes in a forked repository rather than directly in this repo
• Passes precommit. To set up on your local, run pre-commit install from the top level of the repository. To manually run pre-commits, use pre-commit run --all-files and re-add any changed files before committing again and pushing.
• If needed, squash and merge PR commits into a single commit to clean up commit history

[kafitzgerald]

Caught a minor typo in the release notes and it looks like the v2024.01.0 (January 30, 2023) formatting could also use a quick fix. Not sure how I missed that earlier.