feat: Updated the deployment guide

Author: Prajwal-Microsoft

documentation/DeploymentGuide.md

@@ -47,7 +47,14 @@ For **production deployments**, the repository also provides [`main.waf-aligned.
 
 > [!TIP]
 > Always review and adjust parameter values (such as region, capacity, security settings and log analytics workspace configuration) to match your organization’s requirements before deploying. For production, ensure you have sufficient quota and follow the principle of least privilege for all identities and role assignments.
-> If you want to reuse the existing log analytics workspace update the existingWorkspaceResourceId under the logAnalyticsWorkspaceConfiguration in the bicepparm file with the Log analytics workspace id.
+
+> If you want to reuse the existing log analytics workspace update the existingWorkspaceResourceId under the logAnalyticsWorkspaceConfiguration in the bicepparm file with the Log analytics workspace id as shown below.
+```
+param logAnalyticsWorkspaceConfiguration = {
+  dataRetentionInDays: 30
+  existingWorkspaceResourceId: '<Provide existing log analytics workspace id here>'
+}
+```
 
 > [!IMPORTANT]
 > The WAF-aligned configuration is under active development. More Azure Well-Architected recommendations will be added in future updates.