Fix ensembleseries doc build failure

[alexkjames]

Fixes error in recent doc builds causing failure.

Lat and lon were being passed to a series object in the new from_PaleoEnsembleArray functions.

Also fixed wrong class usage in mulensegeoseries docstring

[CommonClimate]

Thanks for identifying the issue. Shouldn't L80 of mulensgeoseries.py say mul_ens = pyleo.MulEnsGeoSeries(ens_list) rather than mul_ens = pyleo.MulEnsGeoSeries([ts_ens])?

[alexkjames]

Thanks for identifying the issue. Shouldn't L80 of mulensgeoseries.py say mul_ens = pyleo.MulEnsGeoSeries(ens_list) rather than mul_ens = pyleo.MulEnsGeoSeries([ts_ens])?

yes, just fixed, thanks for catching that!