update link to RailsBridge on realted-groups page
update link to RailsBridge on realted-groups page

yeungn/hackerhours.org,HackerHours/hackerhours.org,yeungn/hackerhours.org,afeld/hackerhours.org,afeld/hackerhours.org,HackerHours/hackerhours.org,HackerHours/hackerhours.org