Unit label incorrect for specific humidity plots

[oliverwm1]

The units label for specific humidity RMSE (and MAE, MSE etc) plots is "g/kg" but the values are roughly 1e-3 which suggests the data being shown is actually in units of "kg/kg".

For example:

[raspstephan]

Thanks for pointing this out. I will try to remember to change this when I update the plots next.