removed 0.21 where it should be the CORE_MOMENT_OF_INERTIA_FACTOR

src/rotation/moment_of_inertia.c

src/stellar_structure/convective_envelope_mass_and_radius.c

...tellar_structure/stellar_structure_BSE_given_timescales.c

...r_structure/stellar_structure_remnant_and_perturbations.c