add coursersa link to readme to check links

README.md

@@ -4,7 +4,7 @@ This is a bookdown based course to cover the basics of creating documentation an
 
 This course is a part of an [ITCR training series](https://www.itcrtraining.org/) and was in part created from [this github template](https://github.com/jhudsl/OTTR_Template).
 
-You can see the [rendered course material here](https://jhudatascience.org/Documentation_and_Usability/introduction.html) or [on Leanpub here](https://leanpub.com/universities/courses/jhu/documentation_and_usability).
+You can see the [rendered course material here](https://jhudatascience.org/Documentation_and_Usability/introduction.html) or [on Leanpub here](https://leanpub.com/universities/courses/jhu/documentation_and_usability) or [on Coursera here](https://www.coursera.org/learn/documentation-usability-cancer-informatics).
 
 This course guides you on how to make a nice documentation website using [this handy template](https://github.com/jhudsl/template-documentation) and its associated checklists!