Update image filenames in app.py for confusion matrix and feature importance

app.py

@@ -40,7 +40,7 @@ def initialize_app():
         # Initialize pipeline
         pipeline = PhishingDetectionPipeline(
             model_name="phishing_detector",
-            model_version=None,  # Use latest version
+            model_version=3,  # Use latest version
             urlscan_api_key=urlscan_api_key
         )