docs(sphinx): update conf

[sambacha]

language is English, not actually programming language.

this is super meta.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (cbac5ab) 83.81% compared to head (1af5a67) 83.81%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3682   +/-   ##
=======================================
  Coverage   83.81%   83.81%           
=======================================
  Files          91       91           
  Lines       12775    12775           
  Branches     2860     2860           
=======================================
  Hits        10708    10708           
  Misses       1643     1643           
  Partials      424      424           

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[charles-cooper]

closing as stale, please reopen if you have bandwidth to address review comments