fix: update import order and reset execution count in VAT notebook

M2/Clustering In Practice/VAT.ipynb

@@ -2,15 +2,16 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": null,
    "id": "0537d051",
    "metadata": {},
    "outputs": [],
    "source": [
+    "from pyclustertend import hopkins, vat\n",
+    "\n",
     "import numpy as np\n",
     "\n",
     "from sklearn.datasets import load_iris\n",
-    "from pyclustertend import vat, hopkins\n",
     "\n",
     "rng = np.random.default_rng(42)\n",
     "\n",