Update app.py

app.py

@@ -42,7 +42,7 @@ def coordinates_process(texto):
 
 # plan images path
 def plan_images_list():
-    return [file_ for file_ in os.listdir(images_file) if file_.endswith((".JPG", ".jpg", ".jpeg", ".png"))]
+    return [file_ for file_ in os.listdir(images_file) if file_.endswith((".JPG", ".jpg", ".jpeg", ".png", "PNG"))]
 
 # Valdate inputs
 def validate_input(value):