Filter for warning of notebooks in dev

[wd60622]

There are handle for warnings during the documentation build due to the docs/source/notebooks/clv/dev

Here are the logs:

checking consistency... 
pymc-marketing/docs/source/notebooks/clv/dev/beta_geo_beta_binom.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/beta_geo_dev.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/conditional_probability_alive_dev.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/continuous_contractual.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/continuous_non_contractual.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/gamma_gamma_dev.ipynb: WARNING: document isn't included in any toctree
pymc-marketing/docs/source/notebooks/clv/dev/utilities.ipynb: WARNING: document isn't included in any toctree