Regression: Deployment not found

[Gordonby]

This isn't a problem in a release, just with what we have in main.

When providing just 1 parameter, the deployment fails

az deployment group create -g innerloop -f .\bicep\main.bicep -p resourceName=kvv1

{"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":"NotFound","message":"{\r\n "error": {\r\n "code": "DeploymentNotFound",\r\n "message": "Deployment 'keyvault' could not be found."\r\n }\r\n}"}]}}