Daily run failure: add n_samples keyword argument to `ColumnTransfo…

…rmer` in benchmarks (#767)

* add n_samples keyword argument

* not required

* fix

* type check

* finally

* remove auxiliary assignment to _

src/glum_benchmarks/data/create_insurance.py

@@ -180,7 +180,7 @@ def __init__(
             transformer_weights=transformer_weights,
         )
 
-    def _hstack(self, Xs: Iterable[Union[pd.Series, pd.DataFrame]]):
+    def _hstack(self, Xs: Iterable[Union[pd.Series, pd.DataFrame]], *, n_samples=None):
         """Stacks X horizontally."""
         return pd.concat(Xs, axis="columns")