[COOK-1087] Update the CONTRIBUTING file to fix a minor typo
[COOK-1087] Update the CONTRIBUTING file to fix a minor typo

autarchprinceps/sudo,noazark/sudo,chef-cookbooks/sudo,spheromak/sudo,phoolish/sudo,bcg62/sudo,intoximeters/sudo,chef-cookbooks/sudo,bhouse/sudo,davidmarble/cookbook-sudo,vtolstov/cb-sudo,eklein/sudo,kenchan0130/sudo,autarchprinceps/sudo,biola/sudo_cookbook,rackspace-cookbooks/rackspace_sudo,cringdahl/sudo,patdowney/sudo,ClodoCorp/cb-sudo,miketheman/opscode-sudo,fixlr/sudo,trinitronx/sudo,legal90/sudo,cookbooks/oc-sudo,itwasntandy/sudo,juliandunn/sudo,trinitronx/sudo,arrowcircle/chef-sudo,itwasntandy/sudo,kitchenplan/chef-sudoalt,bh016088/sudo,spheromak/sudo,claco/sudo,Youscribe/sudo,bcg62/sudo,noppoMan/sudo,opscode-cookbooks/sudo,itwasntandy/sudo,DonorsChoose/chef-sudo,RSEmail/sudo,spheromak/sudo,team-lab/lab-chef-sudo,dennybaa/sudo,legal90/sudo,behemphi/sudo,kenchan0130/sudo,ouahidi2013/sudo,ClodoCorp/cb-sudo,juliandunn/sudo,cvisionlabops/sudo,intoximeters/sudo,Vinfolio/sudo,tmatilai/chef-sudo,patdowney/sudo,cringdahl/sudo,cookbooks/hw-sudo,opscode-cookbooks/sudo,noppoMan/sudo,cvisionlabops/sudo,vtolstov/cb-sudo,opscode-cookbooks/sudo