[Microsoft.Web/sites]: missing functionAppConfig

### Resource Type

Microsoft.Web/sites

### Api Version

2023-01-01

### Issue Type

Missing property(s)

### Other Notes

I am getting a warning about missing types for functionAppConfig

### Bicep Repro

```bicep
resource functionApp 'Microsoft.Web/sites@2023-01-01' = {
name: '${workload}-${appEnv}-${appName}-func'
location: location
tags: union(tags, {
'hidden-link /app-insights-resource-id': applicationInsights.id
})
kind: 'functionapp,linux'
identity: {
type: 'SystemAssigned'
}
properties: {
serverFarmId: appServicePlan.id
httpsOnly: true
publicNetworkAccess: 'Enabled'
siteConfig: {
appSettings: [
{
name: 'AzureWebJobsStorage__accountName'
value: storageAccount.name
}
{
name: 'AZURE_FUNCTIONS_ENVIRONMENT'
value: appEnv
}
{
name: 'FUNCTIONS_EXTENSION_VERSION'
value: '~4'
}
{
name: 'APP_CONFIG_ENDPOINT'
value: appConfigEndpoint
}
{
name: 'APPLICATIONINSIGHTS_CONNECTION_STRING'
value: applicationInsights.properties.ConnectionString
}
]
cors: {
allowedOrigins: [
'https://portal.azure.com'
]
}
}
functionAppConfig: {
deployment: {
storage: {
type: 'blobContainer'
value: '${storageAccount.properties.primaryEndpoints.blob}/${blobContainerName}'
authentication: {
type: 'SystemAssignedIdentity'
}
}
}
scaleAndConcurrency: {
maximumInstanceCount: 40
instanceMemoryMB: 2048
}
runtime: {
name: 'dotnet-isolated'
version: '8.0'
}
}
}

resource scmPublishingPolicy 'basicPublishingCredentialsPolicies' = {
name: 'scm'
properties: {
allow: true
}
}

resource ftpPublishingPolicy 'basicPublishingCredentialsPolicies' = {
name: 'ftp'
properties: {
allow: false
}
}
}
```

### Confirm

- [X] I have read the troubleshooting guide and looked for duplicates.

Start by locating the Microsoft.Web/sites type definition for API version 2023-01-01 and compare its properties with the Bicep repro, especially functionAppConfig and its nested deployment, scaleAndConcurrency, and runtime sections. Confirm the completed type coverage by checking that this repro no longer reports missing types.

Written by the indexing model from the issue text.