chore: add SECURITY.md (#2)
chore: add SECURITY.md (#2)

* chore: add SECURITY.md

* chore: use a valid post processor image

* 🦉 Updates from OwlBot

Co-authored-by: google-cloud-policy-bot[bot] <92a6cf9f50641a93109ccdcf7086298233589fca@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <50de7473c4bcd6fb06c46bebfdc91e30df56824a@google.com>
Co-authored-by: Owl Bot <7f39581e9a7ddb69f3fa3e6fc69a582ea2916fc9@users.noreply.github.com>
googleapis/python-resource-settings,googleapis/python-resource-settings