RegridLoop does not iterate to the last index in the LUH2 dataset variable list

[glemieux]

The variable varlen does not need to be reduced by one as range will generate an iterable object starting from 0.

tools-fates-landusedata/src/landusedata/regrid.py

Lines 36 to 39 in 5b35732

	ds_varnames = list(ds_to_regrid.variables.keys())
	varlen = len(ds_to_regrid.variables)
	first_var = False
	for i in range(varlen-1):

This is a silent and "harmless" bug as the last index in the LUH2 datasets are not variables that are regridded and thus skipped anyways. That said, this should be fixed should the variable order change.