fix to numpy 2

Author: florian-huber

notebooks/12_clustering.ipynb

@@ -1462,7 +1462,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 25,
    "id": "64e54e05-2c43-4ae1-9a01-47c0eebaa9b8",
    "metadata": {
     "editable": true,
@@ -1505,7 +1505,7 @@
     "X_blobs, _ = make_blobs(n_samples=n_samples, centers=3, cluster_std=1.0, random_state=random_state)\n",
     "\n",
     "# 2. Spiral data\n",
-    "theta = np.concat([\n",
+    "theta = np.concatenate([\n",
     "    np.linspace(0, 2.0 * np.pi, int(n_samples/2)),\n",
     "    np.linspace(2.5 * np.pi, 4.5 * np.pi, int(n_samples/2))\n",
     "])\n",