Update notebooks to latest nbformat

13_loading_and_preprocessing_data.ipynb

@@ -466,9 +466,7 @@
   {
    "cell_type": "code",
    "execution_count": 26,
-   "metadata": {
-    "scrolled": false
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "n_inputs = 8 # X_train.shape[-1]\n",
@@ -2785,5 +2783,5 @@
   }
  },
  "nbformat": 4,
- "nbformat_minor": 1
+ "nbformat_minor": 4
 }