📚 DOCS: Add publishing step

Author: chrisjsewell

README.md

@@ -176,6 +176,7 @@ The publishing of the package should be done *via* the Github Actions CI:
 1. Bump the version with npm, e.g. `npm version patch -m "🚀 RELEASE: v%s"` (major/minor/patch based on [semantic versioning](https://semver.org/))
 2. Push the commit and tag generated by npm (`git push --follow-tags`)
 3. This should trigger the CI action and the `publish` step, check it runs correctly.
+4. Create a GitHub release, pointing to the tag created by npm.
 
 See also: <https://code.visualstudio.com/api/working-with-extensions/publishing-extension#publishing-extensions>, and the [ExecutableBookProject publisher organization](https://dev.azure.com/ExecutableBookProject).