Update publishing instructions

Author: reinink

.github/CONTRIBUTING.md

@@ -4,8 +4,9 @@
 
 This section is intended only for the project maintainers.
 
-1. Increment the version number in the `package.json`, `./react/package.json` and `./vue/package.json` files.
-2. Commit and tag those changes.
-3. Push the commit and tag to GitHub.
-4. Review the draft release generated by GitHub.
-5. Publish the new release on GitHub. This will automatically trigger a GitHub action to publish these packages to NPM.
+1. Increment the version number in the `package.json`, `./react/package.json` and `./vue/package.json` files, and run `npm install` from the project root to update `package-lock.json`.
+2. Update the changelog.
+3. Commit and tag those changes.
+4. Push the commit and tag to GitHub.
+5. Review the draft release generated by GitHub.
+6. Publish the new release on GitHub. This will automatically trigger a GitHub action to publish these packages to NPM.