Fix syntax error

app.py

@@ -6,7 +6,7 @@ import gradio as gr
 X, y = make_circles(n_samples=1_000, factor=0.3, noise=0.05, random_state=0)
 X_train, X_test, y_train, y_test = train_test_split(X, y, stratify=y, random_state=0)
 
-def fit_plot(n_comp, gamma, alpha)
+def fit_plot(n_comp, gamma, alpha):
 
     pca = PCA(n_components=n_comp)
     kernel_pca = KernelPCA(