chore: add RAG notebook titles (#101)

[skip ci]

Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

examples/rag_langchain.ipynb

@@ -1,5 +1,12 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# RAG with Docling and 🦜🔗 LangChain"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

examples/rag_llamaindex.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Quackling — Basic Pipeline"
+    "# RAG with Docling and 🦙 LlamaIndex"
    ]
   },
   {