[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

docs/source/tutorials/stallion.ipynb

@@ -978,7 +978,7 @@
     "    dropout=0.1,  # between 0.1 and 0.3 are good values\n",
     "    hidden_continuous_size=8,  # set to <= hidden_size\n",
     "    loss=QuantileLoss(),\n",
-    "    optimizer=\"Ranger\"\n",
+    "    optimizer=\"Ranger\",\n",
     "    # reduce learning rate if no improvement in validation loss after x epochs\n",
     "    # reduce_on_plateau_patience=1000,\n",
     ")\n",