doc: release notes 7.1
doc: release notes 7.1

vboerchers/checkstyle,rnveach/checkstyle,AkshitaKukreja30/checkstyle,AkshitaKukreja30/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,liscju/checkstyle,ilanKeshet/checkstyle,rnveach/checkstyle,jochenvdv/checkstyle,checkstyle/checkstyle,sirdis/checkstyle,sabaka/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,sharang108/checkstyle,rnveach/checkstyle,romani/checkstyle,izishared/checkstyle,AkshitaKukreja30/checkstyle,nikhilgupta23/checkstyle,izishared/checkstyle,izishared/checkstyle,baratali/checkstyle,nikhilgupta23/checkstyle,MEZk/checkstyle,liscju/checkstyle,MEZk/checkstyle,ilanKeshet/checkstyle,jonmbake/checkstyle,jonmbake/checkstyle,romani/checkstyle,checkstyle/checkstyle,sirdis/checkstyle,checkstyle/checkstyle,baratali/checkstyle,romani/checkstyle,sharang108/checkstyle,ilanKeshet/checkstyle,sirdis/checkstyle,bansalayush/checkstyle,jochenvdv/checkstyle,jonmbake/checkstyle,bansalayush/checkstyle,nikhilgupta23/checkstyle,romani/checkstyle,jochenvdv/checkstyle,bansalayush/checkstyle,sharang108/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,vboerchers/checkstyle,vboerchers/checkstyle,romani/checkstyle,rnveach/checkstyle,liscju/checkstyle,romani/checkstyle,baratali/checkstyle,MEZk/checkstyle,rnveach/checkstyle