[T/RM] Update reference. RHS includes stresses.
In 6fceafae "[PL/RM] Use initial stress in assemble()." the rhs vector was changed, now including also stress related parts, and not only the gravitational forces.
This changes only the NodalForces output, everything else is exactly same as before.
Fixes currently failing large ctests, e.g. https://gitlab.opengeosys.org/ogs/ogs/-/jobs/59930
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