update unassociated machines for clarification (docker#23505)

## Description
- Added some clarifying language for Kapa/Gordon for unassociated
machines to make it clear it can be enabled for the entire org (all
machines) or individual machines

## Related issues or tickets

https://docker.atlassian.net/browse/ENGDOCS-3027?atlOrigin=eyJpIjoiYTAxOTY4NmViZDY5NDk5ZGIxOTg2NWJmYTgyZWU5YzMiLCJwIjoiaiJ9

Author: sarahsanders-docker

content/manuals/unassociated-machines/_index.md

@@ -86,13 +86,20 @@ be required to sign in to Docker Desktop. Once they sign in, their email
 addresses will appear in the Unassociated list, allowing you to then add them
 to your organization.
 
+You can enable sign-in enforcement using two methods:
+
+- For all unassociated machines in your organization
+- For individual unassociated machines
+
 > [!IMPORTANT]
 >
 > Sign-in enforcement only takes effect after Docker Desktop is restarted.
 Users can continue using Docker Desktop until their next restart.
 
 ### Enable sign-in enforcement for all unassociated machines
 
+To enable sign-in enforcement for all unassociated machines:
+
 1. Sign in to the [Admin Console](https://app.docker.com/admin) and select
 your organization.
 1. In **User management**, select **Unassociated**.
@@ -113,6 +120,8 @@ as **Pending** until they update to version 4.41 or later.
 
 ### Enable sign-in enforcement for individual unassociated machines
 
+To enable sign-in enforcement for individual unassociated machines:
+
 1. Sign in to the [Admin Console](https://app.docker.com/admin) and select
 your organization.
 1. In **User management**, select **Unassociated**.