update readme

README.md

@@ -1,6 +1,6 @@
 > **ATTENTION** This is an experimental test of [The Carpentries Workbench](https://carpentries.github.io/workbench) lesson infrastructure.
 > It was automatically converted from the source lesson via [the lesson transition script](https://github.com/carpentries/lesson-transition/).
-> 
+>
 > If anything seems off, please contact Zhian Kamvar [[email protected]](mailto:[email protected])
 
 # Programming with Julia
@@ -14,6 +14,9 @@ programming, but are new to Julia.
 
 ## Contributing
 
+Note: This lessons content is generated from [Literate.jl](https://fredrikekre.github.io/Literate.jl/v2/) files living on the `literate` branch.
+Please edit these for contributing to this lesson.
+
 We welcome all contributions to improve the lesson! Maintainers will do their
 best to help you if you have any questions, concerns, or experience any
 difficulties along the way.