Add info about JS libraries and Helm chart to RELEASE_CHECKLIST.md

RELEASE_CHECKLIST.md

@@ -4,20 +4,48 @@
 - [ ] Update the version to a SNAPSHOT version for pre-release activities
 - [ ] Update all dependencies
 - [ ] Get all tests and checks passing on CI ("Test" workflow)
-- [ ] Create a Python pre-release ("Python pre-release" workflow, manually triggered)
-- [ ] Test snapshot library API, dev Python library release and R package on target Databricks release
-- [ ] Update the supported Databricks Runtime versions in the documentation (`site/docs/libraries/installation/databricks.md`)
+- [ ] Create a Python pre-release ("Python pre-release" workflow, manually
+  triggered)
+- [ ] Test snapshot library API, dev Python library release and R package on
+  target Databricks release
+- [ ] Update the supported Databricks Runtime versions in the
+  documentation (`site/docs/libraries/installation/databricks.md`)
 - [ ] Update licenses (`mvn install -DskipTests -Plicenses`)
 - [ ] Update the version to the release version
 - [ ] Tag the release (`v[version]`)
 - [ ] Merge to main and make sure it is green
-- [ ] Create a GitHub release for the tag, describe new features, bug fixes and breaking changes
+- [ ] Create a GitHub release for the tag, describe new features, bug fixes and
+  breaking changes
 - [ ] Submit the built R package to CRAN manually
 
 ## Updating the version
 
 The version number needs to be changed in the following places:
 
-- [ ] All POM files (version of the main POM, references to parent in all child POMs)
+- [ ] All POM files (version of the main POM, references to parent in all child
+  POMs)
 - [ ] `lib/python/Dockerfile`
 - [ ] `docs/libraries/installation/spark.md`
+
+## JavaScript libraries
+
+The JavaScript libraries (`lib/import` and `lib/js`) are versioned independently
+of the rest of the project. To release changes to these libraries, follow these
+steps:
+
+- [ ] Update the version in `lib/import/package.json`
+  and/or `lib/js/package.json` (using `npm version`)
+- [ ] Tag the repository with `pathling-import-v[version]`
+  and/or `pathling-client-v[version]`
+- [ ] Push the tag to GitHub
+
+## Helm chart
+
+The Helm chart is versioned independently of the rest of the project. The Helm
+chart publishes the chart to the web site based upon the metadata in
+the `Chart.yaml` file.
+
+It only currently supports the publishing of the current version of the chart.
+
+No tagging is required to release the chart, it is built and published upon
+every execution of the "Deploy site" workflow.