cad/freecad: update distinfo for patch file

the generated patch from github now has 11-digit short-hases
(previously we got 12 digits there).
The whole diff between the old and the new file consists of lines like
  -index 14a6d9a763f0..0e9b9e6c9057 100644
  +index 14a6d9a763f..0e9b9e6c905 100644
and no other changes.