fix: Updated read me file to make it clear

Author: Prajwal-Microsoft

docs/CustomizingAzdParameters.md

@@ -38,5 +38,5 @@ azd env set USE_LOCAL_BUILD 'false'
 
 Set the Log Analytics Workspace Id if you need to reuse the existing workspace
 ```shell
-azd env set AZURE_ENV_LOG_ANALYTICS_WORKSPACE_ID '<Existing Log Analytics Workspace Id>'
+azd env set AZURE_ENV_LOG_ANALYTICS_WORKSPACE_ID '/subscriptions/<subscription-id>/resourceGroups/<resource-group>/providers/Microsoft.OperationalInsights/workspaces/<existing-workspace-name>'
 ```