add timing

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/manuals/offload/about.md

@@ -78,10 +78,10 @@ Here's how session management works:
 
 1. You start a new Docker Offload session. You can only have one session active
    at a time.
-2. You receive periodic prompts in the Docker Desktop Dashboard to determine if
-   you are still active. When the prompt appears, your state becomes idle
-   (lasting up to 5 minutes). In the idle state, the remote connection is
-   suspended and containers stop running.
+2. You receive periodic prompts (every 3 hours) in the Docker Desktop Dashboard
+   to determine if you are still active. When the prompt appears, your state
+   becomes idle (lasting up to 5 minutes). In the idle state, the remote
+   connection is suspended and containers stop running.
 3. In the idle state, you can choose to:
    - Do nothing or select **Cancel** in the prompt. Docker Offload remains in
      the idle state.
@@ -90,6 +90,10 @@ Here's how session management works:
      step 2.
 4. If the idle period exceeds 5 minutes, the session ends and any containers,
    images, or volumes are deleted. Return to step 1 for a new clean session.
+5. After 8 hours from the start of your session, you will receive a prompt in
+   the Docker Desktop Dashboard to extend your session. At this time, you can
+   extend your session. If you do not extend your session, it ends and any
+   containers, images, or volumes are deleted.
 
 ## What's next