Update app.py

app.py

@@ -45,7 +45,7 @@ def create_retriever_from_chroma(vectorstore_path="docs/chroma/", search_type='m
 
 
     llm = llamacpp.LlamaCpp(
-        model_path=model_path,
+        model_path='qwen2-0_5b-instruct-q4_0.gguf',
         n_gpu_layers=0,
         temperature=0.0,
         top_p=0.9,
@@ -176,7 +176,7 @@ def create_conversational_rag_chain(retriever):
     callback_manager = CallbackManager([StreamingStdOutCallbackHandler()])
 
     llm = llamacpp.LlamaCpp(
-        model_path=model_path,
+        model_path = "qwen2-0_5b-instruct-q4_0.gguf",
         n_gpu_layers=0,
         temperature=0.4,
         top_p=0.9,