Example notebooks to not specify what version of pymc-marketing was used when last executed

[cluhmann]

The MMM example notebook, the Budget Allocation notebook, the Lift Test Calibration notebook, and likely others specify the versions of python, matplotlib, arviz, numpy, pandas, pymc, and pytensor. Strangely, the version of pymc-marketing is not included. This makes it very difficult to know what features described in the notebook might require in terms of package versions. The version of pymc-marketing seems much more important than the version of something like matplotlib.

Furthermore, the CLV quickstart notebook has no package versions listed at all.

The only notebooks I could find that include a pymc-marketing version are the Pareto/NBD Model notebook, the "Shifted Beta Geometric model with individual customer data" notebook, the "Custom Models with MMM components", and the "other samplers" notebook.