Sentinel example does not work without onboarding workspace resource

[tvriesde]

https://github.com/Azure/azure-quickstart-templates/blob/master/quickstarts/microsoft.operationsmanagement/azure-sentinel/main.bicep

does not work without onboarding the workspace

// Onboard Sentinel after it has been created
resource onboardingStates 'Microsoft.SecurityInsights/onboardingStates@2022-12-01-preview' = {
scope: workspace
name: 'default'
}