Update Day 13 SVM.md (#16)

Update code

Code/Day 13 SVM.md

@@ -25,7 +25,7 @@ X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = 0.25, rand
 from sklearn.preprocessing import StandardScaler
 sc = StandardScaler()
 X_train = sc.fit_transform(X_train)
-X_test = sc.transform(X_test)
+X_test = sc.fit_transform(X_test)
 ```
 
 ## Fitting SVM to the Training set