rewrite demo

app.py

@@ -28,9 +28,7 @@ vlai_template.set_meta(
     description="Predict heart disease risk from patient data with optimized ML models trained on the Cleveland dataset.",
     meta_items=[
         ("Dataset", "Cleveland Heart Disease"),
-        ("Models", "7 Optimized ML Algorithms"),
-        ("Optimization", "Hyperparameter Tuning"),
-        ("Ensemble", "Weighted Soft Voting"),
+        ("Models", "Decision Tree, k-NN, Naive Bayes, Random Forest, AdaBoost, Gradient Boosting, XGBoost"),
     ],
 )