Fix typo in template.js
Fix typo in template.js

refering -> referring
nawawi/pdf.js,macroplant/pdf.js,mozilla/pdf.js,xavier114fch/pdf.js,showpad/mozilla-pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,nawawi/pdf.js,Snuffleupagus/pdf.js,Snuffleupagus/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,nawawi/pdf.js,mozilla/pdf.js,mozilla/pdf.js,macroplant/pdf.js,Shoobx/pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,timvandermeij/pdf.js,macroplant/pdf.js,xavier114fch/pdf.js,showpad/mozilla-pdf.js