Fix HeatConductionProcess parallel (PETSc) build.
Fixes bug https://gitlab.opengeosys.org/ufz-bgr/hpc/docs/-/issues/2 discovered by Shuang.
@ShuangChen88 It would be nice if you could test the fix, too.
Fixes bug https://gitlab.opengeosys.org/ufz-bgr/hpc/docs/-/issues/2 discovered by Shuang.
@ShuangChen88 It would be nice if you could test the fix, too.