chore(docs): add better description for machine image use case (#920)

Add better description for the best use case of machine images. Highlight strengths and weaknesses.

Author: jdpleiness

docs/admin/deploy/index.mdx

@@ -49,7 +49,7 @@ Single-node, self hosted solution for enterprises looking for a simpler, non-Kub
 
 Best for enterprises looking for a self-hosted solution on the Cloud provider of their choice.
 
-Customized machine images allow you to spin up a preconfigured Sourcegraph instance with just a few clicks, all in less than 10 minutes. Currently available in the following hosts:
+Machine images provide a preconfigured Sourcegraph instance that can be deployed in minutes with minimal effort. While they offer simplicity, they are designed as a standardized solution and do not support customization. Currently available on the following hosts:
 
 <QuickLinks>
   <QuickLink title="Amazon Machine Image (AMI)" icon='lightbulb' href="/admin/deploy/machine-images/aws-ami" />