Removed use of json('null')

Author: StefanIvemo

articles/azure-resource-manager/bicep/conditional-resource-deployment.md

@@ -94,10 +94,10 @@ resource vmName_omsOnboarding 'Microsoft.Compute/virtualMachines/extensions@2017
     typeHandlerVersion: '1.0'
     autoUpgradeMinorVersion: true
     settings: {
-      workspaceId: ((!empty(logAnalytics)) ? reference(logAnalytics, '2015-11-01-preview').customerId : json('null'))
+      workspaceId: ((!empty(logAnalytics)) ? reference(logAnalytics, '2015-11-01-preview').customerId : null)
     }
     protectedSettings: {
-      workspaceKey: ((!empty(logAnalytics)) ? listKeys(logAnalytics, '2015-11-01-preview').primarySharedKey : json('null'))
+      workspaceKey: ((!empty(logAnalytics)) ? listKeys(logAnalytics, '2015-11-01-preview').primarySharedKey : null)
     }
   }
 }