fix duplicated anchors 'user-cups' and 'cups-example'
fix duplicated anchors 'user-cups' and 'cups-example'

shalako/docs-dev-guide,cloudfoundry/docs-dev-guide,logit-io/docs-dev-guide,summerzhao/docs-dev-guide,krujos/docs-dev-guide,bridgetkromhout/docs-dev-guide,cwest/docs-dev-guide