remove stable from image

Author: cloga

articles/machine-learning/prompt-flow/how-to-create-manage-runtime.md

@@ -348,7 +348,7 @@ environment:
 
 ### Update a compute instance runtime on a runtime page
 
-We regularly update our base image (`mcr.microsoft.com/azureml/promptflow/promptflow-runtime-stable`) to include the latest features and bug fixes. We recommend that you update your runtime to the [latest version](https://mcr.microsoft.com/v2/azureml/promptflow/promptflow-runtime-stable/tags/list) if possible.
+We regularly update our base image (`mcr.microsoft.com/azureml/promptflow/promptflow-runtime`) to include the latest features and bug fixes. We recommend that you update your runtime to the [latest version](https://mcr.microsoft.com/v2/azureml/promptflow/promptflow-runtime/tags/list) if possible.
 
 Every time you open the page for runtime details, we check whether there are new versions of the runtime. If new versions are available, a notification appears at the top of the page. You can also manually check the latest version by selecting the **Check version** button.