Protected GitHub Branches causes resource deployment failure with a unexpected InternalServerError

If you have a GitHub repo with branch protection on `main` to prevent merges without a PR when you create a new static web app in the azure portal and point it at the main branch you get this 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":"InternalServerError","message":"There was an unexpected InternalServerError. Please try again later. x-ms-correlation-request-id: xxxxxxxxxxxxxx"}]}
```

The reason this happens makes sense but the error is not helpful and took a while to work out why.

I would expect a clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to GitHub, Settings > Branches > Branch protection rules
2. Add a new rule to prevent commits without a PR
3. Go to Azure Portal Create new Static web app selecting to use the GitHub Repo and the main branch
4. See deployment error

**Expected behavior**
A warning to explain you can not select this branch or an after the fact error