Update handler.py

handler.py

@@ -339,7 +339,7 @@ def handler(event):
         endpoint = input_event.get("endpoint", "txt2img")
         params = input_event.get("params", {})
         method = input_event.get("method", "post")
-        is_xl = input_event.get("isXl", False)
+        is_xl = input_event.get("is_xl", False)
         images_field = input_event.get("images_field", "images")
         image_field = input_event.get("image_field", "image")
         lora_urls = params.get("lora_urls")