doc: fix broken link to file filters page
doc: fix broken link to file filters page

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