New notebook added: rag over databricks vector search (#472)

Author: MKhalusova

examplecode/notebooks.mdx

@@ -6,6 +6,14 @@ description: "Notebooks contain complete working sample code for end-to-end solu
 ---
 
 <CardGroup cols={2}>
+    <Card title="RAG with Databricks Vector Search with Context from Multiple Sources" href="https://colab.research.google.com/drive/1ZsrqYVhBAqsr6L98xlVjTZltMzNi_P3o?usp=sharing">
+    <br/>
+       Build RAG with Databricks Vector Search with context preprocessed from multiple sources by Unstructured Platform.
+    <br/>
+       ``Unstructured Platform`` ``Databricks`` ``Introductory notebook``
+    <br/>
+    </Card>
+
     <Card title="Agentic RAG with Hugging Face smolagents vs Vanilla RAG" href="https://colab.research.google.com/drive/1hG3dPgd8wjrO9wSD0K0Feo7EY1iXqrEN?usp=sharing">
     <br/>
        Build Agentic RAG with `smolagents` library and compare the results with Vanilla RAG in pure Python