Update app.py

app.py

@@ -143,15 +143,15 @@ def set_wallpaper_size(size):
 
 def load_predefined_images():
     predefined_images = [
-        "assets/image1.png",
-        "assets/image2.png",
-        "assets/image3.png",
-        "assets/image4.png",
-        "assets/image5.png",
-        "assets/image6.png",
-        "assets/image7.png",
-        "assets/image8.png",
-        "assets/image9.png",
+        "assets/1.png",
+        "assets/2.png",
+        "assets/3.png",
+        "assets/4.png",
+        "assets/5.png",
+        "assets/6.png",
+        "assets/7.png",
+        "assets/8.png",
+        "assets/9.png",
     ]
     return predefined_images