Press: Update URL to Spencer Lyon’s “Hugo and GitHub Pages”
Press: Update URL to Spencer Lyon’s “Hugo and GitHub Pages”

Spencer had moved his web site from http://sglyon.com/ to
http://spencerlyon.com/.  Special thanks to @vsopvsop
for noticing the dead link on the Press coverage page.

Resolves #1446

melo/hugo,mitchchn/hugo,digitalcraftsman/hugo,Zenithar/hugo,fedelibre/hugo,jygastaud/hugo,abourget/hugo,fedelibre/hugo,vbatoufflet/hugo,derekperkins/hugo,kujohn/hugo,bramp/hugo,mdhender/hugo,MarkDBlackwell/hugo,mdhender/hugo,mdhender/hugo,soundrussian/hugo,coderzh/hugo,coderzh/hugo,ffrizzo/hugo,badoet/hugo,derekperkins/hugo,ifraixedes/hugo,badoet/hugo,fhergomez/hugo,abourget/hugo,vbatoufflet/hugo,tjyang/hugo,mayah/hugo,halostatue/hugo,bramp/hugo,jygastaud/hugo,sprig/hugo,tischda/hugo,digitalcraftsman/hugo,tjyang/hugo,gohugoio/hugo,gohugoio/hugo,tatsushid/hugo,mitchchn/hugo,bogem/hugo,halostatue/hugo,anthonyfok/hugo,bogem/hugo,ffrizzo/hugo,fedelibre/hugo,Zenithar/hugo,tatsushid/hugo,soundrussian/hugo,ryanclarke/hugo,tubo028/hugo,mayah/hugo,gohugoio/hugo,tischda/hugo,mdhender/hugo,anthonyfok/hugo,ryanclarke/hugo,kujohn/hugo,tubo028/hugo,sprig/hugo,anthonyfok/hugo,fedelibre/hugo,fhergomez/hugo,melo/hugo,MarkDBlackwell/hugo,ifraixedes/hugo