fix: myst warning -- all cells must be of same type

[RobPasMue]

As title says

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.35%. Comparing base (6ac622f) to head (639f9ae).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1970   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files         123      123           
  Lines        9830     9830           
=======================================
  Hits         8882     8882           
  Misses        948      948           

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