[doc] Fix typo.
[doc] Fix typo.

Signed-off-by: Martin Sustrik <4dd6061be1198639e8b05ce4fd5ead7a0dcaa0f4@250bpm.com>

TTimo/nanomsg,gdamore/mamomsg,krafczyk/nanomsg,tempbottle/nanomsg,thisco-de/nanomsg,reqshark/nanomsg,modulexcite/nanomsg,featherweight/ftw-kernel-nanomsg,wfxiang08/nanomsg,smithed/nanomsg,pakozm/nanomsg,JackDunaway/featherweight-nanomsg,ttyangf/nanomsg,hyperfact/nanomsg,potatogim/nanomsg,hyperfact/nanomsg,kaostao/nanomsg,TTimo/nanomsg,tempbottle/nanomsg,modulexcite/nanomsg,pch957/nanomsg,pch957/nanomsg,krafczyk/nanomsg,cosin2008/nanomsg.NET,pakozm/nanomsg,ttyangf/nanomsg,simplestbest/nanomsg,imp/nanomsg,smithed/nanomsg,simplestbest/nanomsg,wfxiang08/nanomsg,gdamore/mamomsg,TTimo/nanomsg,JackDunaway/featherweight-nanomsg,cosin2008/nanomsg.NET,linearregression/nanomsg,smithed/nanomsg,hyperfact/nanomsg,yan97ao/nanomsg,linearregression/nanomsg,imp/nanomsg,potatogim/nanomsg,yan97ao/nanomsg,zerotacg/nanomsg,pch957/nanomsg,cosin2008/nanomsg.NET,thisco-de/nanomsg,potatogim/nanomsg,ttyangf/nanomsg,kaostao/nanomsg,imp/nanomsg,nirs/nanomsg,nirs/nanomsg,ttyangf/nanomsg,reqshark/nanomsg,gdamore/mamomsg,zerotacg/nanomsg,wirebirdlabs/featherweight-nanomsg,TTimo/nanomsg,nirs/nanomsg,modulexcite/nanomsg,zerotacg/nanomsg,krafczyk/nanomsg,wfxiang08/nanomsg,wirebirdlabs/featherweight-nanomsg,tempbottle/nanomsg,snikulov/nanomsg,wirebirdlabs/featherweight-nanomsg,pakozm/nanomsg,yan97ao/nanomsg,simplestbest/nanomsg,kaostao/nanomsg,reqshark/nanomsg,snikulov/nanomsg,JackDunaway/featherweight-nanomsg,kaostao/nanomsg,featherweight/ftw-kernel-nanomsg,linearregression/nanomsg,smithed/nanomsg