Error in `examples/samples/MLDA_gravity_surveying.ipynb`

[williambdean]

Needs to be ported to latest pymc version.

────────────────────────────────────────── Error running examples/samplers/MLDA_gravity_surveying.ipynb ──────────────────────────────────────────

---------------------------------------------------------------------------
Exception encountered at "In [2]":
---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
Cell In[2], line 13
     11 import numpy as np
     12 import pandas as pd
---> 13 import pymc3 as pm
     14 import theano
     15 import theano.tensor as tt

ModuleNotFoundError: No module named 'pymc3'