Update README.md

Author: mxssl

README.md

@@ -123,6 +123,7 @@ Contributions are always welcome!
 - [ ] [7 Pipeline Design Patterns for Continuous Delivery](https://www.singlestoneconsulting.com/blog/7-pipeline-design-patterns-for-continuous-delivery)
 - [ ] [CI/CD patterns](https://continuousdelivery.com/implementing/patterns)
 - [ ] [Six Strategies for Application Deployment](https://thenewstack.io/deployment-strategies)
+- [ ] [What Is GitOps?](https://codefresh.io/learn/gitops)
 
 ## Clouds