Add two training courses from Coursera (kubernetes#12569)

content/en/docs/tutorials/online-training/overview.md

@@ -29,8 +29,8 @@ Here are some of the sites that offer online training for Kubernetes:
 
 * [Certified Kubernetes Application Developer Preparation Course with Practice Tests (KodeKloud.com)](https://kodekloud.com/p/kubernetes-certification-course)
 
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+* [Getting Started with Google Kubernetes Engine (Coursera)](https://www.coursera.org/learn/google-kubernetes-engine)
 
+* [IBM Cloud: Deploying Microservices with Kubernetes (Coursera)](https://www.coursera.org/learn/deploy-micro-kube-ibm-cloud)
 
+{{% /capture %}}