disable docs navigation with keys

[bjlittle]

🚀 Pull Request

Description

This pull-request addresses the following sphinx-book-theme warning by disabling
navigation with keys, as recommended.

The default value for `navigation_with_keys` will change to `False` in the next release.
If you wish to preserve the old behavior for your site, set `navigation_with_keys=True`
in the `html_theme_options` dict in your `conf.py` file.
Be aware that `navigation_with_keys = True` has negative accessibility implications:
https://github.com/pydata/pydata-sphinx-theme/issues/1492

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fdd6565) 94.93% compared to head (641d886) 94.93%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #639   +/-   ##
=======================================
  Coverage   94.93%   94.93%           
=======================================
  Files         125      125           
  Lines        4778     4778           
=======================================
  Hits         4536     4536           
  Misses        242      242           

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