ci: Build wheels on macOS 26

[godlygeek]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.43%. Comparing base (7a53953) to head (1c339ec).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #989   +/-   ##
=======================================
  Coverage   92.43%   92.43%           
=======================================
  Files         101      101           
  Lines       13160    13160           
  Branches      474      474           
=======================================
  Hits        12164    12164           
  Misses        996      996           

Flag	Coverage Δ
cpp	92.43% <ø> (ø)
python_and_cython	92.43% <ø> (ø)

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[godlygeek]

I tried this seeing if it would make CI run any faster (since the macOS wheel builds are the slowest thing CI does), but it seems like it doesn't make much of a difference.