docs: correct path in readme (#22383)

Description: Fix incorrect path in README instructions.
Issue: N/A
Dependencies: None
Twitter handle: @jddam

---------

Co-authored-by: isaac hershenson <ihershenson@hmc.edu>

templates/rag-pinecone/README.md

@@ -33,6 +33,7 @@ And add the following code to your `server.py` file:
 ```python
 from rag_pinecone import chain as rag_pinecone_chain
 
+# Be careful with this, in the console, when you create the project add_routes(app, rag_pinecone_chain, path="\rag-pinecone") appears with a backslash, the correct route is "/rag-pinecone"
 add_routes(app, rag_pinecone_chain, path="/rag-pinecone")
 ```