[Bug]: "Subnet missing required delegation 'Microsoft.ContainerInstance' for container group 'VSCodeBox

### What happened?

Running the workflow against a subnet with / without the delegation Microsoft.ContainerInstance/containerGroups makes no difference the workflow still fails with the above error.
Any help would be appreciated.

PS
Also the secret variables - in the worklfow you require three variables not one mentioned in the documentation.

### What Image are you seeing the problem on?

VS2022Box, VSCodeBox

### Relevant log output

```shell
SystemExit: ERROR: {"status":"Failed","error":{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"BadRequest","message":"{\r\n \"error\": {\r\n \"code\": \"SubnetMissingRequiredDelegation\",\r\n \"message\": \"Subnet missing required delegation 'Microsoft.ContainerInstance' for container group 'VSCodeBox'.\"\r\n }\r\n}"}]}}
```