added deployment history details

Author: DebarghoGhosh

modules/go-health-monitoring.adoc

@@ -17,6 +17,8 @@ The {gitops-title} Operator will install the GitOps backend service in the `open
 
 . Click on the application name from the list to view the details of a specific application.
 
+. Click on the *Deployment History* to view the application deployment history. The page includes details such as, *Last deployment*, *Description* (commit message), *Environment*, *Outcome* (Succeeded/Failed), *Author* and *Revision*. 
+
 . If the application is `out of sync` or `degraded` applications the respecting icons are displayed under the *Resources*. Hover over the icons to see the health status and the sync status. The icons are:
 
 .. For `degraded`, the broken heart icon is displayed.