Extend title length for xmlto
Extend title length for xmlto

man.th.title.max.length defaults to 20 which leads to a broken .TH line
for i3-migrate-config-to-v4.1:

.TH "I3\-MIGRATE\-CONFIG\" "1" "02/01/2021" "i3 4\&.19\&.1" "i3 Manual"

stapelberg/i3,stapelberg/i3,stapelberg/i3,i3/i3,Airblader/i3,i3/i3,i3/i3,Airblader/i3,i3/i3,Airblader/i3,Airblader/i3,stapelberg/i3