AMLCompute Supported R version

[This doc here](https://azure.github.io/azureml-sdk-for-r/reference/r_environment.html) says the latest version of R supported, is `3.6.0` is this true? @ninghu @sdgilley.

My gut tells me this is a typo...


https://github.com/Azure/azureml-sdk-for-r/blob/67921696803007e06564c429c4d27d93092cefee/man/r_environment.Rd#L108