Update contributors_controller.rb
Update contributors_controller.rb

Changes for rubocop.
DigitalCurationCentre/roadmap,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,CDLUC3/dmptool,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,DMPRoadmap/roadmap,CDLUC3/dmptool