Explicitly set navigation_keys to False to avoid warning

[IAlibay]

I think this warning is causing builds to fail, either way we should just define it.

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[IAlibay]

Relevant pydata-sphinx-theme commit: pydata/pydata-sphinx-theme@36847fc

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2a5d4b8) 92.03% compared to head (058db74) 92.03%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #584   +/-   ##
=======================================
  Coverage   92.03%   92.03%           
=======================================
  Files         123      123           
  Lines        8157     8157           
=======================================
  Hits         7507     7507           
  Misses        650      650           

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