Updated yaml file doc to use checkout@v3 (#436)
Node 12 has been out of support since April 2022, as a result Github has started the deprecation process of Node 12 for GitHub Actions. More details below
https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/
Verified the fix with a local action file with v3 version seems to fix the error in Git Actions
