Arrays in cython in python3.12

[PalPaulD]

The code stopped compiling due to some changes in cython. The arrays types must be specified differently now, this is a small patch that adjusts for this. No functional changes, but now acm package compiles in new cosmodesi env

[SBouchard01]

Thank you very much !
If it compiles and behaves as expected, could you also remove the commented part ? (We can always revert to a previous version trough git if needed ^^)

I also notice the acm/estimators/galaxy_clustering/src/minkowski.pyx file also has the same formatting, does it breaks the compilation too? (otherwise I'm opening an issue for a later fix)