update version

Author: gdbtek

cookbooks/ruby/attributes/default.bash

@@ -1,5 +1,5 @@
 #!/bin/bash -e
 
-export RUBY_DOWNLOAD_URL='https://cache.ruby-lang.org/pub/ruby/2.5/ruby-2.5.3.tar.gz'
+export RUBY_DOWNLOAD_URL='https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.0.tar.gz'
 
 export RUBY_INSTALL_FOLDER_PATH='/Volumes/Data/Tools/ruby'