docs/examples.md: Change " to ' for docs
docs/examples.md: Change " to ' for docs

rbelnap/dnscontrol,whs/dnscontrol,mathieuherbert/dnscontrol,mathieuherbert/dnscontrol,StackExchange/dnscontrol,whs/dnscontrol,rbelnap/dnscontrol,StackExchange/dnscontrol,StackExchange/dnscontrol