updated bestseller image

Author: stacksimplify

README.md

@@ -1,6 +1,6 @@
 # Azure Kubernetes Service with Azure DevOps and Terraform 
 
-[![Image](https://stacksimplify.com/course-images/azure-kubernetes-service-with-azure-devops-and-terraform.png "Azure Kubernetes Service with Azure DevOps and Terraform")](https://www.udemy.com/course/azure-kubernetes-service-with-azure-devops-and-terraform/?referralCode=2499BF7F5FAAA506ED42)
+[![Image](https://stacksimplify.com/course-images/azure-kubernetes-service-with-azure-devops-and-terraform-bestseller.png "Azure Kubernetes Service with Azure DevOps and Terraform")](https://www.udemy.com/course/azure-kubernetes-service-with-azure-devops-and-terraform/?referralCode=2499BF7F5FAAA506ED42)
 
 
 ## Course Modules