Fixed an bug in optimize_peps_unitcell

[MPMPMPMPMPMPMP]

This pull request fixes a bug when restarting with restart_from_state_file in the nonspiral peps case.

♻️ Found restartable state: autosave_j1jchi_chiB_5_jchi_0.85.hdf5.restartable. Restarting...
Traceback (most recent call last):
  File "/home/t30/bra/ge65gos/qmb-ml/peps_calculation/simulations/run_j1_jchi_simulation.py", line 162, in <module>
    result = varipeps.optimization.restart_from_state_file(restart_state_file)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/space-nobackup/ge65gos/jax_cuda12/lib/python3.12/site-packages/varipeps/optimization/optimizer.py", line 1524, in restart_from_state_file
    return optimize_peps_unitcell(
           ^^^^^^^^^^^^^^^^^^^^^^^
TypeError: optimize_peps_unitcell() got an unexpected keyword argument 'restart_state'