Added missing import for accuracy_score

README.md

@@ -39,6 +39,7 @@ Fitting a classifier and predicting looks like this:
 ```python
 from sklearn.datasets import load_breast_cancer
 from sklearn.model_selection import train_test_split
+from sklearn.metrics import accuracy_score
 from tabpfn import TabPFNClassifier
 
 X, y = load_breast_cancer(return_X_y=True)