Fix failing CI tests

[nsiccha]

Closes #476

[nsiccha]

AFAICT, at least the main tests pass locally for julia 1.12.2 - let's see what github says.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 77.58%. Comparing base (52a7737) to head (3d47e8a).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/riemannian/integrator.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #479      +/-   ##
==========================================
- Coverage   77.66%   77.58%   -0.09%     
==========================================
  Files          21       21              
  Lines        1240     1240              
==========================================
- Hits          963      962       -1     
- Misses        277      278       +1     

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[nsiccha]

Apparently the Riemannian stuff has 0% test coverage? In any case, it looks like the important tests will pass now - I've assigned @penelopeysm to review.