Update add.ipynb

Author: mhjensen

doc/src/week15/add.ipynb

@@ -1240,7 +1240,15 @@
      "outputs_hidden": false
     }
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Epoch 1/5, Loss: 0.1831\n"
+     ]
+    }
+   ],
    "source": [
     "model = SimpleUNet(channels).to(device)\n",
     "opt   = torch.optim.Adam(model.parameters(), lr=lr)\n",