Doc: small fix in documentation
Doc: small fix in documentation

Change-Id: If7c0e3f33c8c73695492511ff51ab58f4a7863d0
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@digia.com>

remimixlr/QtWebsocket,pixty/qtwebsockets,pixty/qtwebsockets,SfietKonstantin/qtwebsockets