[Microsoft.Web/sites/config]: Missing ipSecurityRestrictionsDefaultAction

### Resource Type

Microsoft.Web/sites/config

### Api Version

2020-12-01

### Issue Type

Missing property(s)

### Other Notes

ipSecurityRestrictionsDefaultAction is missing

### Bicep Repro

```bicep
resource siteConfig 'Microsoft.Web/sites/config@2020-12-01' = {
name: 'web'
parent: appService
properties: {
ipSecurityRestrictions: ipSecurityRestrictions
ipSecurityRestrictionsDefaultAction: ipRestriction_enable ? 'Deny' : 'Allow'
}
}
```

### Confirm

- [X] I have searched this repository and have not found similar issue reports.

Search the type definitions for Microsoft.Web/sites/config at API version 2020-12-01 and compare them with the Bicep repro. Confirm how the missing ipSecurityRestrictionsDefaultAction property is represented in this repository; done means the generated Azure resource type exposes that property with the expected value shape.

Written by the indexing model from the issue text.