Bug#1122864: graphviz: dot emits error with fontname=Helvetica

[Drew Parsons]

Package: graphviz
Followup-For: Bug #1122864
Control: unblock 1122412 by 1122864
Control: fixed 1122864 14.1.1-1

This bug is fixed now with graphviz 14.1.1-1

fenics-basix is able to build docs again.