fix corrupted format

notebooks/official/model_registry/bqml_vertexai_model_registry.ipynb

@@ -772,7 +772,8 @@
    "cell_type": "markdown",
    "metadata": {
     "id": "C39qOaBHZI1G"
-       "source": [
+    },
+    "source": [
     "## Send Explainable AI request to the Vertex AI Endpoint resource\n",
     "\n",
     "If this is a supported BQML model type for Vertex Explainable AI, you can get explainations for your resource. To learn more about using Vertex AI Explainability on BQML models, see [Explainable AI for BigQuery ML models](https://cloud.google.com/bigquery-ml/docs/vertex-xai)\n",