Update autotune_scvi.ipynb

based on scverse/scvi-tools#3013 (comment)

tuning/autotune_scvi.ipynb

@@ -389,7 +389,7 @@
    "source": [
     "search_space = {\n",
     "    \"model_params\": {\"n_hidden\": tune.choice([64, 128, 256]), \"n_layers\": tune.choice([1, 2, 3])},\n",
-    "    \"train_params\": {\"max_epochs\": 100},\n",
+    "    \"train_params\": {\"max_epochs\": 100, \"plan_kwargs\": {\"lr\": tune.loguniform(1e-4, 1e-2)}},\n",
     "}"
    ]
   },
@@ -400,9 +400,9 @@
    "source": [
     "There are a couple more arguments we should be aware of before fitting the tuner:\n",
     "\n",
-    "- `num_samples`: The total number of hyperparameter sets to sample from `search_space`. This is the total number of models that will be trained.\n",
+    "- `num_samples`: The total number of hyperparameter sets to sample from ``. This is the total number of models that will be trained.\n",
     "\n",
-    "  For example, if we set `num_samples=2`, we might sample two models with the following hyperparameter configurations:\n",
+    "  For example, if we set `num_samples=2`, based on the above search space, we might sample two models with the following hyperparameter configurations:\n",
     "\n",
     "  ```python\n",
     "  model1 = {\n",