(AzureCXP) changing public/private configs

Per git issue : https://github.com/MicrosoftDocs/azure-docs/issues/38001

The values should be changed according to the docs to a hashmap https://docs.microsoft.com/en-us/powershell/module/az.compute/set-azvmextension?view=azps-2.6.0

Author: Frank Hu

articles/security-center/security-center-enable-data-collection.md

@@ -282,13 +282,13 @@ You can manually install the Log Analytics Agent, so Security Center can collect
 
    3. Populate the public config and the private config with these values:
 
-           $PublicConf = '{
-               "workspaceId": "WorkspaceID value"
-           }' 
+           $PublicConf = @{
+               "workspaceId"= "<WorkspaceID value>"
+           }
 
-           $PrivateConf = '{
-               "workspaceKey": "<Primary key value>”
-           }' 
+           $PrivateConf = @{
+               "workspaceKey"= "<Primary key value>”
+           }
 
 	  - When installing on a Windows VM: