added graph rag notebook (#764)

Co-authored-by: ajay23-uns <[email protected]>

Author: ajaykrish-uns

examplecode/notebooks.mdx

@@ -4,8 +4,14 @@ sidebarTitle: Notebooks
 mode: wide
 description: "Notebooks contain complete working sample code for end-to-end solutions."
 ---
-
 <CardGroup cols={2}>
+   <Card title="Graph RAG for Academic Papers" href="https://colab.research.google.com/github/Unstructured-IO/notebooks/blob/main/notebooks/GraphRAG_for_Academic_Papers.ipynb">
+    <br/>
+      Learn how to build a GraphRAG system for research papers using Unstructured's Named Entity Recognition to extract custom entities and relationships, then query them with Neo4j to answer complex questions that require understanding connections between models, datasets, and metrics.
+    <br/>
+       ``Unstructured API`` ``Workflows`` ``Graph RAG`` ``S3`` ``Neo4j`` 
+    <br/>
+    </Card>
    <Card title="Unstructured API Walkthrough" href="https://colab.research.google.com/github/Unstructured-IO/notebooks/blob/main/notebooks/Unstructured_API_Walkthrough.ipynb">
     <br/>
        This walkthrough provides you with deep, hands-on experience with the Unstructured API. As you follow along, you will learn how to use many of the Unstructured API's features for partitioning, enriching, chunking, and embedding.