Minor documentation update (#1948)

* Update to use non-deprecated output parser imports

* Update documentation

* Revert "Update to use non-deprecated output parser imports"

This reverts commit 11a969d82b6b2b3659eb7c3c26b5b29a98815834.

docs/docs/tutorials/rag-with-astradb.mdx

@@ -143,7 +143,7 @@ The RAG flow is a bit more complex. It consists of:
   style={{ width: "80%", margin: "20px auto" }}
 />
 
-To run it all we have to do is click on the ⚡ _Run_ button and start interacting with your RAG application.
+To run it all we have to do is click on the 🤖 _Playground_ button and start interacting with your RAG application.
 
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