Update docs/notebooks/bold_realignment.ipynb

Author: oesteban

docs/notebooks/bold_realignment.ipynb

@@ -82,7 +82,7 @@
     "        raise FileNotFoundError(f\"Directory does not exist: {DATA_PATH}\")\n",
     "\n",
     "    _path = DATA_PATH / \"synthstrip.1.pt\"\n",
-    "    if not _path.exists() or not _path.is_dir():\n",
+    "    if not _path.exists():\n",
     "        raise FileNotFoundError(f\"synthstrip file does not exist: {_path}\")\n",
     "\n",
     "    if not bmask_path.exists():\n",