[docs] update header include to new style

[aaronj0]

No description provided.

[mcbarton]

@aaronj0 Sorry about stopping the workflows running in this PR. I did it as I need to rebuild the cache on main at the moment, since some of the builds got deleted. Without rebuilding the cache, the space we have to stored llvm builds would be overwhelmed quite quickly. If you want I will restart the workflow in this PR in about 1.5 hours, once the cache is rebuilt. You can also restart them yourself once this workflow finishes running https://github.com/compiler-research/CppInterOp/actions/runs/15765979794 which is rebuilding the cache.

[aaronj0]

@aaronj0 Sorry about stopping the workflows running in this PR. I did it as I need to rebuild the cache on main at the moment, since some of the builds got deleted. Without rebuilding the cache, the space we have to stored llvm builds would be overwhelmed quite quickly. If you want I will restart the workflow in this PR in about 1.5 hours, once the cache is rebuild. You can also restart them yourself once this workflow finishes running https://github.com/compiler-research/CppInterOp/actions/runs/15765979794 which is rebuilding the cache.

no worries, thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.69%. Comparing base (130dd30) to head (269334a).
⚠️ Report is 58 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #638   +/-   ##
=======================================
  Coverage   78.69%   78.69%           
=======================================
  Files           9        9           
  Lines        3835     3835           
=======================================
  Hits         3018     3018           
  Misses        817      817           

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