Add assignment requirements statement (#4246)

Signed-off-by: galiacheng <haixia.cheng@microsoft.com>

 Changes to be committed:
	modified:   documentation/4.0/content/samples/azure-kubernetes-service/includes/prerequisites-01.txt
	modified:   documentation/4.0/content/samples/azure-kubernetes-service/includes/prerequisites-02.txt

documentation/4.0/content/samples/azure-kubernetes-service/includes/prerequisites-01.txt

@@ -2,6 +2,11 @@
 
 This sample assumes the following prerequisite environment.
 
+* If you don't have an [Azure subscription](https://learn.microsoft.com/en-us/azure/guides/developer/azure-developer-guide#understanding-accounts-subscriptions-and-billing), create a [free account](https://azure.microsoft.com/free/?ref=microsoft.com&utm_source=microsoft.com&utm_medium=docs&utm_campaign=visualstudio) before you begin.
+  * It's recommended that the Azure identity you use to sign in and complete this article has either the [Owner](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#owner) role in the current subscription or the [Contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) and [User Access Administrator](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#user-access-administrator) roles in the current subscription. 
+  * If your identity has very limited role assignments, ensure you have the following role assignments in the AKS resource group and AKS node resource group.
+    * [Contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) role and [User Access Administrator](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#user-access-administrator) role in the resource group that runs AKS cluster. This requires asking a privileged user to assign the roles before creating resource in the resource group.
+    * [Contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) role in the AKS node resource group whose name starts with "MC_". This requires asking a privileged user to assign the role after the AKS instance is created.
 * Operating System: GNU/Linux, macOS or [WSL2 for Windows 10](https://docs.microsoft.com/windows/wsl/install-win10).
 * [Git](https://git-scm.com/downloads); use `git --version` to test if `git` works.  This document was tested with version 2.25.1.
 * [Azure CLI](https://docs.microsoft.com/cli/azure); use `az --version` to test if `az` works.  This document was tested with version 2.48.1.

documentation/4.0/content/samples/azure-kubernetes-service/includes/prerequisites-02.txt

@@ -2,9 +2,12 @@
 
 This sample assumes the following prerequisite environment.
 
+* If you don't have an [Azure subscription](https://learn.microsoft.com/en-us/azure/guides/developer/azure-developer-guide#understanding-accounts-subscriptions-and-billing), create a [free account](https://azure.microsoft.com/free/?ref=microsoft.com&utm_source=microsoft.com&utm_medium=docs&utm_campaign=visualstudio) before you begin.
+  * It's recommended that the Azure identity you use to sign in and complete this article has either the [Owner](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#owner) role in the current subscription or the [Contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) and [User Access Administrator](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#user-access-administrator) roles in the current subscription. 
+  * If your identity has very limited role assignments, ensure you have [Contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) role and [User Access Administrator](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#user-access-administrator) role in the resource group that runs the AKS cluster. This requires asking a privileged user to assign the roles before creating resources in the resource group.
 * Operating System: GNU/Linux, macOS or [WSL2 for Windows 10](https://docs.microsoft.com/windows/wsl/install-win10).
 * [Git](https://git-scm.com/downloads); use `git --version` to test if `git` works.  This document was tested with version 2.25.1.
-* [Azure CLI](https://docs.microsoft.com/cli/azure); use `az --version` to test if `az` works.  This document was tested with version 2.39.0.
+* [Azure CLI](https://docs.microsoft.com/cli/azure); use `az --version` to test if `az` works.  This document was tested with version 2.48.1.
 * [Docker for Desktop](https://www.docker.com/products/docker-desktop).  This document was tested with `Docker version 20.10.7`
 * [kubectl](https://kubernetes-io-vnext-staging.netlify.com/docs/tasks/tools/install-kubectl/); use `kubectl version` to test if `kubectl` works.  This document was tested with version v1.21.2.
 * [Helm](https://helm.sh/docs/intro/install/), version 3.1 and later; use `helm version` to check the `helm` version.  This document was tested with version v3.6.2.