FIX docstring

Author: gmartinonQM

mapie/regression.py

@@ -373,9 +373,9 @@ def _fit_and_predict_oof_model(
         Tuple[RegressorMixin, NDArray, ArrayLike]
 
         - [0]: RegressorMixin, fitted estimator
-        - [1]: NDArrayof shape (n_samples_val,),
+        - [1]: NDArray of shape (n_samples_val,),
           estimator predictions on the validation fold.
-        - [3]: NDArray of shape (n_samples_val,),
+        - [3]: ArrayLike of shape (n_samples_val,),
           validation data indices.
         """
         X_train = _safe_indexing(X, train_index)