Adding redirect message to graph RAG notebook (#656)

* Adding IMPORTANT banner at the top of astra_support.ipynb that redirects to the new graph-rag project.

* Adding one more package name to the list of deprecated ones.

Author: briangodsey

libs/knowledge-store/notebooks/astra_support.ipynb

@@ -1,5 +1,23 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# IMPORTANT: new `graph-rag` project with improved functionality\n",
+    "\n",
+    "> Since the date of publication, some code in this notebook has been superseded by\n",
+    "> a new, dedicated \n",
+    "> [Graph RAG project](https://datastax.github.io/graph-rag/).\n",
+    "> \n",
+    "> Specifically, the `ragstack-ai-langchain`, `ragstack-ai-knowledge-graph`, and\n",
+    "> `ragstack-ai-knowledge-store` libraries are no longer under development.\n",
+    "> \n",
+    "> Instead, you can find the latest tools and techniques for working with knowledge\n",
+    "> graphs and graph RAG in the \n",
+    "> [Graph RAG project](https://datastax.github.io/graph-rag/)."
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},