MDB - update snapshot link

Author: RoseHJM

articles/dev-box/how-to-restore-from-snapshot.md

@@ -45,7 +45,11 @@ The retention period includes 10 short snapshots and 4 long snapshots, totaling
 
 ## Take a manual snapshot of your dev box
 
-1. Sign in to the [developer portal](https://aka.ms/devbox-portal).
+You can take a manual snapshot of your dev box to create a restore point before making significant changes, such as installing new software or making configuration changes.
+
+This feature is currently in preview. You can try it out by following these steps:
+
+1. Sign in to the [developer portal](https://aka.ms/TryManualSnapshot).
 
 1. On the dev box that you want to take a snapshot of, select the actions menu, and then select **Take snapshot**.