[doc] Add extra line to PR template
[doc] Add extra line to PR template

Add "how to write the perfect pull request" to PR template
wegtam/playframework,wegtam/playframework,wsargent/playframework,Shruti9520/playframework,ktoso/playframework,richdougherty/playframework,aradchykov/playframework,hagl/playframework,ktoso/playframework,wegtam/playframework,benmccann/playframework,rajeshpg/playframework,rajeshpg/playframework,mkurz/playframework,hagl/playframework,benmccann/playframework,Shruti9520/playframework,zaneli/playframework,Shenker93/playframework,playframework/playframework,playframework/playframework,wegtam/playframework,wsargent/playframework,aradchykov/playframework,Shenker93/playframework,zaneli/playframework,marcospereira/playframework,mkurz/playframework,Shruti9520/playframework,aradchykov/playframework,marcospereira/playframework,wsargent/playframework,mkurz/playframework,rajeshpg/playframework,zaneli/playframework,Shruti9520/playframework,wsargent/playframework,richdougherty/playframework,aradchykov/playframework,Shenker93/playframework,playframework/playframework,ktoso/playframework,ktoso/playframework,benmccann/playframework,zaneli/playframework,hagl/playframework,richdougherty/playframework,Shenker93/playframework,benmccann/playframework,marcospereira/playframework,richdougherty/playframework,hagl/playframework,rajeshpg/playframework,marcospereira/playframework,mkurz/playframework