chore: add resource under postgresql-dba:postgresql-infrastructure-skills:kubernetes-deployment

src/data/roadmaps/postgresql-dba/content/107-postgresql-infrastructure-skills/105-kubernetes-deployment/index.md

@@ -67,4 +67,6 @@ You can deploy a PostgreSQL application on Kubernetes by following these steps:
 
 - **Scale your deployment** - You can easily scale your PostgreSQL application by changing the number of replicas in the deployment file, then updating it using `kubectl apply -f deployment.yaml`.
 
-By following these steps, you can successfully deploy and manage a PostgreSQL application using the Kubernetes deployment system.
+By following these steps, you can successfully deploy and manage a PostgreSQL application using the Kubernetes deployment system.
+
+- [Run PostgreSQL. The Kubernetes way](https://cloudnative-pg.io/)