Update java version. Use new tag

Author: edburns

articles/aks/howto-deploy-java-liberty-app.md

@@ -33,7 +33,7 @@ This article uses the Azure Marketplace offer for Open/WebSphere Liberty to acce
 
 * If running the commands in this guide locally (instead of Azure Cloud Shell):
   * Prepare a local machine with Unix-like operating system installed (for example, Ubuntu, Azure Linux, macOS, Windows Subsystem for Linux).
-  * Install a Java SE implementation (for example, [Eclipse Open J9](https://www.eclipse.org/openj9/)).
+  * Install a Java SE implementation, version 17 or later. (for example, [Eclipse Open J9](https://www.eclipse.org/openj9/)).
   * Install [Maven](https://maven.apache.org/download.cgi) 3.5.0 or higher.
   * Install [Docker](https://docs.docker.com/get-docker/) for your OS.
 * Make sure you've been assigned either the `Owner` role or the `Contributor` and `User Access Administrator` roles in the subscription. You can verify it by following steps in [List role assignments for a user or group](../role-based-access-control/role-assignments-list-portal.md#list-role-assignments-for-a-user-or-group).
@@ -110,7 +110,7 @@ There are a few samples in the repository. We'll use *java-app/*. Here's the fil
 ```azurecli-interactive
 git clone https://github.com/Azure-Samples/open-liberty-on-aks.git
 cd open-liberty-on-aks
-git checkout 2023-07-21
+git checkout 20230723
 ```
 
 If you see a message about being in "detached HEAD" state, this message is safe to ignore. It just means you have checked out a tag.