Tighten this for the changelog. Be specific.
release-notes.md
## Tinta 2.4

We are really excited to announce that Tinta 2.4 is finally here and available for everyone to use today!

### What's new

- Exports are now a lot faster than they used to be.
- Fixed a bug where some people could sometimes not sign in.
- Dark mode.

Thanks to everyone who sent us feedback!

Cut 12 words and named the numbers. Keep what reads right.