Updated release checklist to include updating the CHANGELOG

RELEASE_CHECKLIST.md

@@ -2,19 +2,21 @@
 
 Make sure each of these things are done in sequence before a release.
 
-- [ ] 1. `git checkout master` - make sure you are on master
+- [ ] 1. `git checkout master` and `git pull` - make sure you are on master and have the latest changes
 - [ ] 2. Check `Cargo.toml` to make sure you are publishing the intended version
-- [ ] 3. Update `docs/_data/lib.json` with the version to be published
-- [ ] 3. `git push origin master` -  make sure everything is pushed
-- [ ] 4. `git status` - nothing to commit, working directory clean
-- [ ] 5. `cargo package` - check which files are being included in the build
-- [ ] 6. `cargo test --features "test unstable"` - all tests should pass
-- [ ] 7. `cargo run --example runtest` - runtest should exit successfully
-- [ ] 8. `cargo build --examples` - all examples should build
-- [ ] 9. `cargo doc --open` - spot check the documentation for any issues
-- [ ] 10. `cargo publish --dry-run` - everything should pass
-- [ ] 11. `cargo publish` - this will upload the package and is NOT reversible
-- [ ] 12. `git tag v1.2.3` - create a tag with the correct version
-- [ ] 13. `git push origin --tags` - push the new tags to the repository
-- [ ] 15. Update the version in `Cargo.toml` in master to the next version to be released
-- [ ] 16. `git push origin master` - push anything new
+- [ ] 3. Update `Unreleased` section in `CHANGELOG.md` to list version being published and update links
+- [ ] 4. Update `docs/_data/lib.json` with the version to be published
+- [ ] 5. `git push origin master` -  make sure everything is pushed
+- [ ] 6. `git status` - nothing to commit, working directory clean
+- [ ] 7. `cargo package` - check which files are being included in the build
+- [ ] 8. `cargo test --features "test unstable"` - all tests should pass
+- [ ] 9. `cargo run --example runtest` - runtest should exit successfully
+- [ ] 10. `cargo build --examples` - all examples should build
+- [ ] 11. `cargo doc --open` - spot check the documentation for any issues
+- [ ] 12. `cargo publish --dry-run` - everything should pass
+- [ ] 13. `cargo publish` - this will upload the package and is NOT reversible
+- [ ] 14. `git tag v1.2.3` - create a tag with the correct version
+- [ ] 15. `git push origin --tags` - push the new tags to the repository
+- [ ] 17. Update the version in `Cargo.toml` in master to the next version to be released
+- [ ] 18. Add a new `Unreleased` section to `CHANGELOG.md` with relevant section headings from https://keepachangelog.com
+- [ ] 19. `git push origin master` - push anything new