Update README.md

Author: monkstone

README.md

@@ -1,7 +1,7 @@
 __C6H3N3O7__ [![Gem Version](https://badge.fury.io/rb/picrate.svg)](https://badge.fury.io/rb/picrate)![Travis CI](https://travis-ci.org/ruby-processing/PiCrate.svg)
 
 # PiCrate
-Version for RaspberryPI `Stretch` and `Oracle JDK8`, will probably also work on `OpenJDK11+. For latest version see auto-install script for [PiCrate-2.0](https://gist.github.com/monkstone/6ae9840d7b7008c177b4a9f589d14ec6) on Buster (tested on RaspberryPI4). Create processing sketches in ruby on raspberry-pi and linux (this project is a parallel development of [propane][propane] targetting the raspberry-pi, but will initially be developed on a regular linux box). The aim is to produce a gem installable app that can be run with jruby, with minimal dependencies. Drop the `C` and you get pirate, or and an `e` and get `PiCreate`, a happy coincidence?
+Version for RaspberryPI `Stretch` and `Oracle JDK8`, will probably also work on `OpenJDK11+. For latest version see auto-install script for [PiCrate-2.0][buster] on Buster (tested on RaspberryPI4). Create processing sketches in ruby on raspberry-pi and linux (this project is a parallel development of [propane][propane] targetting the raspberry-pi, but will initially be developed on a regular linux box). The aim is to produce a gem installable app that can be run with jruby, with minimal dependencies. Drop the `C` and you get pirate, or and an `e` and get `PiCreate`, a happy coincidence?
 
 ### To install from rubygems ###
 
@@ -54,6 +54,6 @@ MySketch.new
 jruby --dev my_sketch.rb # --dev flag speeds start-up
 ```
 
-
+[buster]:https://gist.github.com/monkstone/6ae9840d7b7008c177b4a9f589d14ec6
 [propane]:https://ruby-processing.github.io/propane/
 [oracle]:http://www.rpiblog.com/2014/03/installing-oracle-jdk-8-on-raspberry-pi.html