fix: bugs

Signed-off-by: ivelin <ivelin.eth@gmail.com>

app.py

@@ -26,7 +26,7 @@ def process_refexp(image: Image, prompt: str):
     pixel_values = processor(image, return_tensors="pt").pixel_values
 
     # prepare decoder inputs
-    task_prompt = "<s_refexp><s_prompt>{user_input}</s_prompt><s_refexp>"
+    task_prompt = "<s_refexp><s_prompt>{user_input}</s_prompt><s_target_bounding_box>"
     prompt = task_prompt.replace("{user_input}", prompt)
     decoder_input_ids = processor.tokenizer(
         prompt, add_special_tokens=False, return_tensors="pt").input_ids