Add token permissions for node.yml

[arjundashrath]

GitHub asks users to define workflow permissions, see https://github.blog/changelog/2021-04-20-github-actions-control-permissions-for-github_token/ and https://docs.github.com/en/actions/security-guides/automatic-token-authentication#modifying-the-permissions-for-the-github_token for securing GitHub workflows against supply-chain attacks.

The Open Source Security Foundation (OpenSSF) Scorecards also treats not setting token permissions as a high-risk issue.

This repository has a Scorecards score of 3/10 with 10 being the most secure. The Token-Permissions category has a score of 0/10.

This file was fixed automatically using the open-source tool https://github.com/step-security/secure-workflows. If you like the changes and merge them, please consider starring the repo.