Update app.py

app.py

@@ -5,7 +5,7 @@ from langchain.prompts import ChatPromptTemplate
 from langchain.chains import RetrievalQA, ConversationalRetrievalChain
 from langchain.memory import ConversationBufferMemory
 from langchain_huggingface.embeddings import HuggingFaceEmbeddings
-from langchain_community.vectorstores import Chroma
+from langchain_chroma import Chroma
 
 def rag_retriever(message, history, system_prompt, num_sources=4, temperature=0):
     chat = ChatGroq(temperature=temperature, model_name="llama3-70b-8192", api_key=os.getenv("GROQ_API_KEY"))