The current link in the README directs to a github page that has a link
to the documentation page on how to write release notes. I've updated
the link here to just go straight to the documenation page on how to
write good release notes.

See https://github.com/actualbudget/docs/pull/129

 for more details. If
this is accepted, I’ll fill in release notes for the PRs that have been
submitted since the last release and submit a corresponding PR to
`actual-server`.

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>