Release process

Pre-requisites

Bump the version on docs/modules/antora.yml and package.json.
Run npm install --package-lock-only to update the version on package-lock.json.
Create the changelog for the new version on changelog.adoc.
Create a "Prepare release x.x.x" commit with the above changes and open a PR to main.
Get the PR approved and merged.
For a new minor version, create a new branch (for a patch release, switch to branch) release/x.x based on main (for a patch release, merge/cherry-pick) and push it upstream.
git tag -a x.x.x -m "Release version x.x.x"
git push upstream refs/tags/x.x.x
Wait for CI job to complete
Make sure the pkl-lang.org CI built these changes and they are showing in the website.