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

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Author: pre-commit-ci[bot]

generation/maisi/maisi_train_diff_unet_tutorial.ipynb

@@ -404,7 +404,7 @@
     "work_dir = \"./temp_work_dir\"\n",
     "if not os.path.isdir(work_dir):\n",
     "    os.makedirs(work_dir)\n",
-    "download_model_data(maisi_version, work_dir,model_only=True)\n",
+    "download_model_data(maisi_version, work_dir, model_only=True)\n",
     "\n",
     "dataroot_dir = os.path.join(work_dir, \"sim_dataroot\")\n",
     "if not os.path.isdir(dataroot_dir):\n",