Add ArgoCD to Continuous Integration & Continuous Deployment (#631)

Co-authored-by: nodiscc <nodiscc@gmail.com>

README.md

@@ -184,6 +184,7 @@ _Related: [IT Asset Management](#it-asset-management)_
 
 [Continuous integration](https://en.wikipedia.org/wiki/Continuous_integration)/[deployment](https://en.wikipedia.org/wiki/Continuous_deployment) software.
 
+- [ArgoCD](https://argo-cd.readthedocs.io/en/stable/) - Declarative, GitOps continuous delivery tool for Kubernetes. ([Source Code](https://github.com/argoproj/argo-cd)) `Apache-2.0` `Go`
 - [Buildbot](https://buildbot.net/) - Python-based toolkit for continuous integration. ([Source Code](https://github.com/buildbot/buildbot)) `GPL-2.0` `Python`
 - [CDS](https://ovh.github.io/cds/) - Enterprise-Grade Continuous Delivery & DevOps Automation Open Source Platform. ([Source Code](https://github.com/ovh/cds)) `BSD-3-Clause` `Go`
 - [Concourse](https://concourse-ci.org/) - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. ([Demo](https://ci.concourse-ci.org/), [Source Code](https://github.com/concourse/concourse)) `Apache-2.0` `Go`