Update AHI_NOMINAL_CENTRAL_WAVELENGTHS_UM C01 from 0.46 to 0.47
Note from JGerth:
Also, the first value in AHI_NOMINAL_CENTRAL_WAVELENGTHS_UM can be updated from 0.46 to 0.47. There is no 0.46 in the HCast, but when we produce target areas, it matters.