Better workflowr refererence

[athchen]

I think this link is a better starter/reference for workflowr. Not sure if the README is more updated than this but they should be mostly the same: https://jdblischak.github.io/workflowr/

ads2020/03-week.Rmd

Line 388 in 13eef18

* [workflowr](https://github.com/jdblischak/workflowr) - is a package for setting up and automating some of the file organization/folder structure described in this lecture. It also contains workflow management functions and can be combined with drake to make workflows automated.