typo in 'get_leakage_spectra' and 'get_leakage_beams" functions

[CesileyKing]

norm_fac in both of these functions should be the entire spectrum that is being normalized by, not the maximum of that spectrum. That is, in MMTModules.py, lines 243 and 409 should read norm_fac = binned_spectra_dict['TT'][1:] ; lines 245 and 411 should read norm_fac = binned_spectra_dict['EE'][1:] ; and lines 247 and 413 should read norm_fac = binned_spectra_dict['BB'][1:] .

[laurensaunders]

PR on 7/23/24 makes get_leakage_spectra2, which uses this normalization convention instead. Left the original get_leakage_spectra function as is because it is correct for beam systematics work. Did not touch get_leakage_beams--is that also a function we should copy over and switch the normalization for? Do you use get_leakage_beams (I haven't, at least thus far)?