fix extra space typo in BaseDatastore

neural_lam/datastore/base.py

@@ -159,7 +159,7 @@ def get_standardization_dataarray(self, category: str) -> xr.Dataset:
         the category. For `category=="state"`, the dataarray should also
         contain a `state_diff_mean` and `state_diff_std` variable for the one-
         step differences of the state variables. The returned dataarray should
-        at least have dimensions of `({categ ory}_feature)`, but can also
+        at least have dimensions of `({category}_feature)`, but can also
         include for example `grid_index` (if the standardization is done per
         grid point for example).