change ruby version in build to 2.1
change ruby version in build to 2.1

kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,hagaiGS/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,hagaiGS/gigaspaces-wiki-jekyll,hagaiGS/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,hagaiGS/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll