Update README.md

README.md

@@ -6,14 +6,18 @@
 [![CI status](https://github.com/JuliaInterop/RCall.jl/actions/workflows/ci.yml/badge.svg)](https://github.com/JuliaInterop/RCall.jl/actions/workflows/ci.yml)
 [![Code coverage](https://codecov.io/gh/JuliaInterop/RCall.jl/branch/master/graph/badge.svg?token=8ED5Wdm8W9)](https://codecov.io/gh/JuliaInterop/RCall.jl)
 
-#### Installation
+## Installation
 
-[Installation](http://juliainterop.github.io/RCall.jl/stable/installation)
+See the [Installation](http://juliainterop.github.io/RCall.jl/stable/installation) section of the documentation.
 
-#### Getting Started
+## Getting Started
 
-[Getting Started](http://juliainterop.github.io/RCall.jl/stable/gettingstarted).
+See the [Getting Started](http://juliainterop.github.io/RCall.jl/stable/gettingstarted) section of the documentation.
 
-#### ggplot2 demonstration
+# ggplot2 demonstration
 
 ![](ggplot.png)
+
+# Calling Julia from R
+
+See the JuliaCall library to [call Julia from R](https://non-contradiction.github.io/JuliaCall//index.html).