Not to spam PR with comments - single comment and update

[vineethvijay7]

This by default seems to send multiple / added up comments to PR - on new commits.

By logic, it makes sense. But would be nice if we have following option:

• Write single comment and edit it with some changed content -(commit id or something)

Example: mshick/add-pr-comment@v2 uses the above logic - would be nice to refer from.