chore: add OpenSSF scorecard

Signed-off-by: Michael Crenshaw <[email protected]>

README.md

@@ -4,6 +4,7 @@
 [![slack](https://img.shields.io/badge/slack-argoproj-brightgreen.svg?logo=slack)](https://argoproj.github.io/community/join-slack)
 [![Build Status](https://travis-ci.org/argoproj/argo-events.svg?branch=master)](https://travis-ci.org/argoproj/argo-events)
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/3832/badge)](https://bestpractices.coreinfrastructure.org/projects/3832)
+[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/argoproj/argo-events/badge)](https://api.securityscorecards.dev/projects/github.com/argoproj/argo-events)
 [![GoDoc](https://godoc.org/github.com/argoproj/argo-events?status.svg)](https://godoc.org/github.com/argoproj/argo-events/pkg/apis)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
 [![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/argo-events)](https://artifacthub.io/packages/helm/argo/argo-events)
@@ -75,4 +76,4 @@ Apache License Version 2.0, see [LICENSE](./LICENSE)
 
 ## Security
 
-Please see [SECURITY.md](https://github.com/argoproj/argo-events/blob/master/SECURITY.md)
+Please see [SECURITY.md](https://github.com/argoproj/argo-events/blob/master/SECURITY.md)