Merge pull request #898 from alan-turing-institute/fix_ensemble_kwargs_bug

Fix ensemble tuning params bug

Author: radka-j

autoemulate/emulators/ensemble.py

@@ -139,7 +139,7 @@ def __init__(
         standardize_y: bool = True,
         n_emulators: int = 4,
         device: DeviceLike | None = None,
-        mlp_kwargs: dict | None = None,
+        **mlp_kwargs,
     ):
         """
         Initialize an ensemble of MLPs.