Update app.py

added deepseek free model, cause llama3.3 70 B model gettimg some error

app.py

@@ -28,7 +28,8 @@ vectorstore = FAISS.from_documents(docs,
 retriever = vectorstore.as_retriever()
 model = ChatTogether(
     # model="meta-llama/Llama-3-70b-chat-hf",   
-    model = "meta-llama/Llama-3.3-70B-Instruct-Turbo-Free",
+    # model = "meta-llama/Llama-3.3-70B-Instruct-Turbo-Free",
+    model = "deepseek-ai/DeepSeek-R1-Distill-Llama-70B-free",
     temperature=0.0,
     max_tokens=500,)