adding upgrade info

Author: Larry Franks

includes/machine-learning-cli-sdk-v2-prereqs.md

@@ -8,8 +8,6 @@ ms.author: larryfr
 
 Before following the steps in this article, make sure you have the following prerequisites:
 
-* An Azure subscription. If you don't have an Azure subscription, create a free account before you begin. Try the [free or paid version of Azure Machine Learning](https://azure.microsoft.com/free/).
-
 * An Azure Machine Learning workspace. If you don't have one, use the steps in the [Quickstart: Create workspace resources](../articles/machine-learning/quickstart-create-resources.md) article to create one.
 
 * The Azure CLI and the `ml` extension __or__ the Azure Machine Learning Python SDK v2:
@@ -25,4 +23,10 @@ Before following the steps in this article, make sure you have the following pre
         pip install azure-ai-ml azure-identity
         ```
 
+        To update an existing installation of the SDK to the latest version, use the following command:
+
+        ```bash
+        pip install --upgrade azure-ai-ml azure-identity
+        ```
+
         For more information, see [Install the Python SDK v2 for Azure Machine Learning](https://aka.ms/sdk-v2-install).

includes/machine-learning-sdk-v2-prereqs.md

@@ -8,8 +8,6 @@ ms.author: larryfr
 
 Before following the steps in this article, make sure you have the following prerequisites:
 
-* An Azure subscription. If you don't have an Azure subscription, create a free account before you begin. Try the [free or paid version of Azure Machine Learning](https://azure.microsoft.com/free/).
-
 * An Azure Machine Learning workspace. If you don't have one, use the steps in the [Quickstart: Create workspace resources](../articles/machine-learning/quickstart-create-resources.md) article to create one.
 
 * To install the Python SDK v2, use the following command:
@@ -18,4 +16,10 @@ Before following the steps in this article, make sure you have the following pre
     pip install azure-ai-ml azure-identity
     ```
 
+    To update an existing installation of the SDK to the latest version, use the following command:
+
+    ```bash
+    pip install --upgrade azure-ai-ml azure-identity
+    ```
+
     For more information, see [Install the Python SDK v2 for Azure Machine Learning](/python/api/overview/azure/ai-ml-readme).