Upgrade Node.js to v20 and upgrade npm packages.

[iamdharmesh]

Description of the Change

PR upgrades the Node.js version to v20 from v16 and also upgrades the following npm packages.

• @actions/core from 1.10.1 to 1.11.0
• @octokit/action from 6.0.6 to 7.0.0
• @vercel/ncc from 0.38.1 to 0.38.2

Closes #124

How to test the Change

• Run this Action in another repo (use this PR branch)
• Verify that no warning present there about the node version. (eg: https://github.com/iamdharmesh/action-pr-helper-test/actions/runs/11181984641)

Changelog Entry

Changed - Bump Node.js version from v16 to v20
Changed - Bump @actions/core from 1.10.1 to 1.11.0
Changed - Bump @octokit/action from 6.0.6 to 7.0.0
Changed - Bump @vercel/ncc from 0.38.1 to 0.38.2

Credits

Props @dkotter @iamdharmesh

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.