Update protocol-documentation.md (#1964)
Update protocol-documentation.md (#1964)

* Update protocol-documentation.md

* typo

nmarley/dash,biblepay/biblepay,thelazier/dash,ionomy/ion,ivansib/sibcoin,biblepay/biblepay,nmarley/dash,crowning-/dash,nmarley/dash,biblepay/biblepay,biblepay/biblepay,nmarley/dash,thelazier/dash,dashpay/dash,crowning-/dash,crowning-/dash,biblepay/biblepay,dashpay/dash,ionomy/ion,ionomy/ion,dashpay/dash,ivansib/sibcoin,ivansib/sibcoin,biblepay/biblepay,crowning-/dash,biblepay/biblepay,thelazier/dash,nmarley/dash,UdjinM6/dash,ionomy/ion,crowning-/dash,dashpay/dash,biblepay/biblepay,ionomy/ion,dashpay/dash,nmarley/dash,UdjinM6/dash,thelazier/dash,crowning-/dash,ionomy/ion,nmarley/dash,UdjinM6/dash,ivansib/sibcoin,UdjinM6/dash,ivansib/sibcoin,ivansib/sibcoin,UdjinM6/dash,thelazier/dash