Bug#1096624: fenics-dolfinx: ftbfs with GCC-15

[Drew Parsons]

Source: fenics-dolfinx
Followup-For: Bug #1096624
Control: tags -1 ftbfs

There is a fair change this is not a gcc-15 bug, nor even a bug at all.
It's more likely to be a nanobind inconsistency.

All nanobind clients need to be rebuilt at the same time to maintain
interoperability.

cf. dolfinx-mpc Bug#1096535
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1096535