Update app.py

app.py

@@ -11,7 +11,7 @@ MODELS = {
     "DistilBERT": "distilbert-base-uncased",
     "BERT": "bert-base-uncased",
     "RoBERTa": "roberta-base",
-    "LLaMA2_13B_chat": "meta-llama/Llama-2-13b-chat-hf",
+    "LLaMA2_7B_chat": "meta-llama/Llama-2-7b-chat-hf",
     "LLaMA2_70B": "meta-llama/Llama-2-70b-hf",
     "ChatGLM3_6B": "THUDM/chatglm-6b",
     "InternLM_7B": "internlm/internlm-7b",