update the notebook used in the lab to use the true 2.5D code #203

Job	Run time
Ex1 (3.8, ubuntu-latest, tests/test_dcip.py)	1h 46m 34s
Ex1 (3.8, ubuntu-latest, tests/test_em.py)	2h 57m 35s
Ex1 (3.8, ubuntu-latest, tests/test_gpr.py tests/test_seismic.py)	4h 6m 14s
Ex1 (3.8, ubuntu-latest, tests/test_inversion.py)	1h 11m 7s
Ex1 (3.8, ubuntu-latest, tests/test_gravity.py tests/test_mag.py)	35m 41s
Ex1 (3.10, ubuntu-latest, tests/test_dcip.py)	1m 42s
Ex1 (3.10, ubuntu-latest, tests/test_em.py)	1h 47m 22s
Ex1 (3.10, ubuntu-latest, tests/test_gpr.py tests/test_seismic.py)	4h 5m 40s
Ex1 (3.10, ubuntu-latest, tests/test_inversion.py)	1m 17s
Ex1 (3.10, ubuntu-latest, tests/test_gravity.py tests/test_mag.py)	35m 48s
	17h 9m 0s

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