docs `networkx`update (#14426)

Added setting up instruction, package description and link

docs/docs/use_cases/graph/graph_networkx_qa.ipynb

@@ -5,11 +5,33 @@
    "id": "a6850189",
    "metadata": {},
    "source": [
-    "# NetworkX Graph QA\n",
+    "# NetworkX\n",
+    "\n",
+    ">[NetworkX](https://networkx.org/) is a Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks.\n",
     "\n",
     "This notebook goes over how to do question answering over a graph data structure."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "f96662d5-1b68-4b38-9da8-56bf3463b138",
+   "metadata": {},
+   "source": [
+    "## Setting up\n",
+    "\n",
+    "We have to install a Python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "21bd86df-9717-4a27-9233-1404c89cf442",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "!pip install networkx"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "9e516e3e",
@@ -295,7 +317,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.1"
+   "version": "3.10.12"
   }
  },
  "nbformat": 4,