solve bug

app.py

@@ -34,7 +34,7 @@ def run_rembg(img):
 def run_rembg_withmodel(img, model):    
     logger.debug(f"model name : {model}")
     logger.debug(f"model name : {type(model)}")
-    session = new_session("isnet-general-use")
+    session = new_session(model)
     logger.debug(f"session name : {session}")
     output = remove(img, session=session)
     output_pil = Image.fromarray(output)