docs(installation): add Ruby DevKit installation instructions link

Author: marin-bratanov

README.md

@@ -46,7 +46,7 @@ sh start-docs.sh
 
 ### Instructions (without Docker)
 - Install ruby 2.3.3 ([64bit](https://dl.bintray.com/oneclick/rubyinstaller/rubyinstaller-2.3.3-x64.exe) or [32bit](https://dl.bintray.com/oneclick/rubyinstaller/rubyinstaller-2.3.3-x64.exe))
-- Install Ruby DevKit ([64bit](https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe) or [32bit](https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-32-4.7.2-20130224-1151-sfx.exe))
+- Install Ruby DevKit ([64bit](https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe) or [32bit](https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-32-4.7.2-20130224-1151-sfx.exe)), see the [instructions](https://github.com/oneclick/rubyinstaller/wiki/Development-Kit#installation-instructions)
 - Ensure everything is correctly installed, especially if you have previous versions installed on the machine (e.g. check whether the 'config.yml' file in the DevKit root folder contains the correct path to the ruby folder and check whether the system environmnet variables are correctly set).
 
 > For more info on the above you can read the following article - http://jekyll-windows.juthilo.com/1-ruby-and-devkit/.