Documentation Link points to a 404

[rogancarr]

Describe the bug
The link to documentation points to: https://docs.microsoft.com/en-us/nimbusml/tutorials, which gives a 404

To Reproduce
Steps to reproduce the behavior:

1. Go to github page, scroll to the paragraph that reads:

This is an open source project located at https://github.com/Microsoft/NimbusML. We'd love for you to try it out and/or contribute! For a full list of the samples/notebooks, please refer to our documentation.

2. Click on 'documentation'
3. See that there is a 404

Expected behavior
This should link to the live documentation site.