Add markdown above all the download functions.

Author: JakeRadMSFT

machine-learning/E2E-Classification with Iris Dataset.ipynb

@@ -157,6 +157,14 @@
       ],
       "outputs": []
     },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "## Download or Locate Data\n",
+        "The following code tries to locate the data file in a few known locations or it will download it from the known GitHub location."
+      ]
+    },
     {
       "cell_type": "code",
       "execution_count": 1,

machine-learning/E2E-Forecasting using Regression with Luna Dataset.ipynb

@@ -116,6 +116,14 @@
         "In the code block below, we show how to load dataset into `DataFrame`."
       ]
     },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "#### Download or Locate Data\n",
+        "The following code tries to locate the data file in a few known locations or it will download it from the known GitHub location."
+      ]
+    },
     {
       "cell_type": "code",
       "execution_count": 1,

machine-learning/E2E-Forecasting using SSA with Luna Dataset.ipynb

@@ -110,6 +110,14 @@
       ],
       "outputs": []
     },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "#### Download or Locate Data\n",
+        "The following code tries to locate the data file in a few known locations or it will download it from the known GitHub location."
+      ]
+    },
     {
       "cell_type": "code",
       "execution_count": 1,