try to fix ndcg bug

app.py

@@ -15,6 +15,8 @@ import spaces
 import ir_datasets
 import pytrec_eval
 from huggingface_hub import login
+import transformers
+import peft
 import faiss
 import sys
 
@@ -48,7 +50,7 @@ def log_system_info():
     logger.info(f"transformers: {transformers.__version__}")
     logger.info(f"peft: {peft.__version__}")
     logger.info(f"faiss: {faiss.__version__}")
-    logger.info(f"gradio: {gradio.__version__}")
+    logger.info(f"gradio: {gr.__version__}")
     logger.info(f"pytrec_eval: {pytrec_eval.__version__}")
     logger.info(f"ir_datasets: {ir_datasets.__version__}")