docs: fix math part 2

[nwlandry]

take 2.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (5b2cc16) 91.11% compared to head (a460be2) 91.11%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #382   +/-   ##
=======================================
  Coverage   91.11%   91.11%           
=======================================
  Files          46       46           
  Lines        3771     3771           
=======================================
  Hits         3436     3436           
  Misses        335      335           

Impacted Files	Coverage Δ
xgi/algorithms/centrality.py	97.39% <ø> (ø)
xgi/algorithms/clustering.py	96.66% <ø> (ø)
xgi/classes/function.py	100.00% <ø> (ø)
xgi/generators/classic.py	98.07% <ø> (ø)

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[thomasrobiglio]

thank you, I will go over the whole sphinx later today or tomorrow to check if I can find something else to be fixed.