docs: add FOSSA License Badge for CLOMonitor

- this is the last non-security check we need for CNCF CLOMonitor
  - after this, all the non-security checks will be at 100%

- note that while we already use Snyk, it actually does not support Go dep badges: https://support.snyk.io/hc/en-us/articles/360003997277-Badge-Support-for-Repositories
  - so use FOSSA, which [Argo CD already uses](https://github.com/argoproj/argo-cd/blob/a9f03aa8ccdafc350b96ee90db054b11cad44692/README.md?plain=1#L11) and is already integrated into Argoproj

- we do also have some license checks to resolve there, I am working on those as well

Signed-off-by: Anton Gilgur <[email protected]>

README.md

@@ -1,7 +1,8 @@
 <!-- markdownlint-disable-next-line MD041 -->
 [![slack](https://img.shields.io/badge/slack-argoproj-brightgreen.svg?logo=slack)](https://argoproj.github.io/community/join-slack)
-[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/3830/badge)](https://bestpractices.coreinfrastructure.org/projects/3830)
+[![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/3830/badge)](https://bestpractices.coreinfrastructure.org/projects/3830)
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/argoproj/argo-workflows/badge)](https://api.securityscorecards.dev/projects/github.com/argoproj/argo-workflows)
+[![FOSSA License Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fargoproj%2Fargo-workflows.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fargoproj%2Fargo-workflows?ref=badge_shield)
 [![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/argo-workflows)](https://artifacthub.io/packages/helm/argo/argo-workflows)
 [![Twitter Follow](https://img.shields.io/twitter/follow/argoproj?style=social)](https://twitter.com/argoproj)