add header for EDML BLUE

Author: yellowbean

docs/source/nbsample/EDML_BLUE_2024.ipynb

@@ -1,5 +1,13 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "60e98898",
+   "metadata": {},
+   "source": [
+    "#### EDML BLUE Ducth RMBS sample"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,