Insecure request in tutorial

[frankharkins]

I came across the following error while trying the Visualize distances with MDM and NCH tutorial.

Downloading data from 'https://zenodo.org/record/2649069/files/subject_01.zip' to file '/mne_data/MNE-braininvaders2012-data/record/2649069/files/subject_01.zip'.
.venv/lib/python3.11/site-packages/urllib3/connectionpool.py:1063: InsecureRequestWarning: Unverified HTTPS request is being made to host 'zenodo.org'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html#ssl-warnings

This is being hidden by users due to the following line. I recommend removing this; it's better for users to see warnings than to be hiding dangerous behaviour from them.

warnings.filterwarnings("ignore")