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

mattstratton/sql_server,dstj/sql_server,leyshon/sql_server,aaronstoddard/sql_server,cla-rce/sql_server,DuncanWalker903/sql_server,criteo-forks/sql_server,jerrelblankenship/sql_server,digital11/sql_server,tpetchel/sql_server,jakimowicz/sql_server,10thmagnitude/sql_server,schubergphilis/sql_server,aimtheory/sql_server,jerrelblankenship/sql_server,RobertRehberg/sql_server,aaronstoddard/sql_server,opscode-cookbooks/sql_server,schubergphilis/sql_server,sneal/sql_server,RobertRehberg/sql_server,tpetchel/sql_server,mahsoud/sql_server,jakimowicz/sql_server,mahsoud/sql_server,shope99/sql_server,chef-cookbooks/sql_server,chef-cookbooks/sql_server,juliandunn/sql_server,criteo-forks/sql_server,cookbooks/oc-sql_server,jeppenejsum/sql_server,e100/sql_server,opscode-cookbooks/sql_server,xacaxulu/sql_server,leyshon/sql_server,xacaxulu/sql_server,mattstratton/sql_server