Windows runner for Azure keyvault

Azure cli should be the replacement for: https://github.com/Azure/get-keyvault-secrets
for retrieving secrets from Azure key vault. But the old `get-keyvault-secrets` worked also on windows runner but Azure cli does not because of the check:

https://github.com/Azure/cli/blob/master/src/main.ts#L19
```
if (process.env.RUNNER_OS != 'Linux') {
core.setFailed('Please use Linux based OS as a runner.');
return;
}
```
`get-keyvault-secrets` is going to be deprecated, so how to make `Azure/cli` work for windows runners ?