Added correct code to sync with Notebook

docs/challenge/network.mdx

@@ -13,35 +13,42 @@ The provided scripts are incomplete. Replace all `<CODE_BLOCK>` with the correct
 
 ```python
 from datetime import datetime, timedelta
+from zoneinfo import ZoneInfo 
 
 # Calculate the date and time 24 hours from now
-delete_after = (datetime.utcnow() + timedelta(hours=24)).isoformat() + 'Z'
+delete_after = (datetime.now(ZoneInfo('UTC')) + timedelta(hours=24)).isoformat()
 
 !atlas accessLists <CODE_BLOCK>
 ```
 
 :::tip
 Docs : atlas [accessList](https://www.mongodb.com/docs/atlas/cli/current/command/atlas-accessLists/#std-label-atlas-accessLists)
+:::
 
 <details>
     <summary> Answer </summary>
     ```python
-    from datetime import datetime, timedelta
+from datetime import datetime, timedelta
+from zoneinfo import ZoneInfo 
 
 # Calculate the date and time 24 hours from now
-delete_after = (datetime.utcnow() + timedelta(hours=24)).isoformat() + 'Z'
+delete_after = (datetime.now(ZoneInfo('UTC')) + timedelta(hours=24)).isoformat()
 
-!atlas accessLists create --currentIp --projectId {project_id} --deleteAfter "{delete_after}"
+!atlas accessLists <CODE_BLOCK> --projectId {project_id} --deleteAfter {delete_after}
 ```
 </details>
 
+:::info
+The IP added is the "local" IP for the environment running the notebook. If you're running this in Collab / Codespaces this local IP will not be your computer's local IP.
 :::
 
 ### 2. Check that "My current IP" was added
 ```python
 !atlas accessLists list --output json --projectId {project_id}
 ```
 
+You should get a JSON document that contains information in the `results` array.
+
 ## Next steps
 
 Start the chapter on [authentication](./authentication) for database user management.