Added two "s" and removed repeated "since"
Added two "s" and removed repeated "since"

As per sbelzile and maferland's comments
acverrette/source.coveo.com,SLangevin/source.coveo.com,Coveo/coveo.github.io,jflheureux/source.coveo.com,Coveo/coveo.github.io,amoreauCoveo/source.coveo.com,Coveo/source.coveo.com,Coveo/source.coveo.com,amoreauCoveo/source.coveo.com,SLangevin/source.coveo.com,Coveo/source.coveo.com,malaporte/source.coveo.com,acverrette/source.coveo.com,malaporte/source.coveo.com,jflheureux/source.coveo.com