Update exo2

module2/exo2/exercice.ipynb

@@ -161,6 +161,13 @@
     "std = np.std(data, ddof=1)\n",
     "print(std)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Test commit and push"
+   ]
   }
  ],
  "metadata": {