update cross-encoder

app.py

@@ -79,7 +79,7 @@ def init_models():
         "question-answering", model='sultan/BioM-ELECTRA-Large-SQuAD2-BioASQ8B',
         device=device
     )
-    reranker = CrossEncoder('cross-encoder/ms-marco-MiniLM-L-6-v2', device=device)
+    reranker = CrossEncoder('cross-encoder/ms-marco-MiniLM-L-12-v2', device=device)
     queryexp_tokenizer = AutoTokenizer.from_pretrained("doc2query/all-with_prefix-t5-base-v1")
     queryexp_model = AutoModelWithLMHead.from_pretrained("doc2query/all-with_prefix-t5-base-v1")
     return question_answerer, reranker, stop, device, queryexp_model, queryexp_tokenizer