ci: use node-version 20 rather than 18

[tyao117]

PR summary

Upgrade to node v20, replacing v18

PR Checklist

Please make sure that your PR fulfills the following requirements:

• [ ] The commit message follows the Angular Commit Message Guidelines.
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

Current vs new behavior

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

[archanaponnada]

:tada: This PR is included in version 5.1.4 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: