more 404

[[az140mp/azure-quickstart-templates](https://github.com/az140mp/azure-quickstart-templates)/[application-workloads](https://github.com/az140mp/azure-quickstart-templates/tree/master/application-workloads)/[active-directory](https://github.com/az140mp/azure-quickstart-templates/tree/master/application-workloads/active-directory)/active-directory-new-domain/]

### Validation failed.
{"code":"MultipleErrorsOccurred","details":[{"code":"InvalidContentLink","message":"Unable to download deployment content from 'https://raw.githubusercontent.com/Azure/azure-quickstart-templates/master/application-workloads/active-directory/nestedtemplates/vnet.json'. The tracking Id is 'ffa6d653-2ef5-48a5-8a87-765d37932f98'. Please see https://aka.ms/arm-deploy for usage details."},{"code":"InvalidContentLink","message":"Unable to download deployment content from 'https://raw.githubusercontent.com/Azure/azure-quickstart-templates/master/application-workloads/active-directory/nestedtemplates/vnet-with-dns-server.json'. The tracking Id is 'ffa6d653-2ef5-48a5-8a87-765d37932f98'. Please see https://aka.ms/arm-deploy for usage details."}],"message":"Multiple error occurred: BadRequest,BadRequest. Please see details."}

### Repro steps (*if necessary, delete otherwise*)
1. click Deploy To Azure
2. upload L06-rg_template.parameters.json
3. click Review + create
4.
5.

Start with application-workloads/active-directory/active-directory-new-domain/ and inspect the references to nestedtemplates/vnet.json and nestedtemplates/vnet-with-dns-server.json. Reproduce the Deploy to Azure flow using L06-rg_template.parameters.json and check the validation errors. Done means the referenced deployment content can be downloaded and validation no longer reports these 404 links.

Written by the indexing model from the issue text.