Update agent_vectorstore.ipynb (#2358)

Hi I am learning LangChain and I read that VectorDBQA was changed to
RetrievalQA I thought I could help by making the change if I am wrong
could you give me some feedback I am still learning.

source:
https://blog.langchain.dev/retrieval/#:~:text=Changed%20all%20our,a%20chat%20model
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@ -9,7 +9,7 @@
"\n", "\n",
"This notebook covers how to combine agents and vectorstores. The use case for this is that you've ingested your data into a vectorstore and want to interact with it in an agentic manner.\n", "This notebook covers how to combine agents and vectorstores. The use case for this is that you've ingested your data into a vectorstore and want to interact with it in an agentic manner.\n",
"\n", "\n",
"The reccomended method for doing so is to create a VectorDBQAChain and then use that as a tool in the overall agent. Let's take a look at doing this below. You can do this with multiple different vectordbs, and use the agent as a way to route between them. There are two different ways of doing this - you can either let the agent use the vectorstores as normal tools, or you can set `return_direct=True` to really just use the agent as a router." "The reccomended method for doing so is to create a RetrievalQA and then use that as a tool in the overall agent. Let's take a look at doing this below. You can do this with multiple different vectordbs, and use the agent as a way to route between them. There are two different ways of doing this - you can either let the agent use the vectorstores as normal tools, or you can set `return_direct=True` to really just use the agent as a router."
] ]
}, },
{ {