Add referance to additional language runtimes repos.

Author: ezzarghili

README.md

@@ -1,3 +1,5 @@
 # GraalVM Downloads [![Latest release](https://img.shields.io/github/v/release/graalvm/graalvm-ce-builds?color=brightgreen&label=latest%20release)](https://github.com/graalvm/graalvm-ce-builds/releases/latest)
 
-This repository hosts [GraalVM Community](https://github.com/oracle/graal/) [builds](https://github.com/graalvm/graalvm-ce-builds/releases/) based on OpenJDK.
+This repository hosts [GraalVM Community](https://github.com/oracle/graal/)'s [builds](https://github.com/graalvm/graalvm-ce-builds/releases/) based on OpenJDK.
+
+Additional language runtimes such as [Python](https://github.com/oracle/graalpython/releases), [Ruby](https://github.com/oracle/truffleruby/releases), [JavaScript and Node.JS](https://github.com/oracle/graaljs/releases), designed for use with GraalVM, are available for download as standalone distributions in the related repositories.