docs: add bq studio link for a new ipynb file called "bq_dataframes_template.ipynb" (#1239)

Co-authored-by: Shuowei Li <shuowei@google.com>

Author: Shuowei Li

notebooks/getting_started/bq_dataframes_template.ipynb

@@ -49,7 +49,13 @@
         "      <img src=\"https://lh3.googleusercontent.com/UiNooY4LUgW_oTvpsNhPpQzsstV5W8F7rYgxgGBD85cWJoLmrOzhVs_ksK_vgx40SHs7jCqkTkCk=e14-rj-sc0xffffff-h130-w32\" alt=\"Vertex AI logo\">\n",
         "      Open in Vertex AI Workbench\n",
         "    </a>\n",
-        "  </td>                                                                                               \n",
+        "  </td>\n",
+        "  <td>\n",
+        "    <a href=\"https://pantheon.corp.google.com/bigquery?ws=!1m7!1m6!12m5!1m3!1sbigframes-dev!2sus-central1!3s9cb631d0-d2c2-4352-808c-15a4f94cf082!2e2\">\n",
+        "      <img src=\"https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTW1gvOovVlbZAIZylUtf5Iu8-693qS1w5NJw&s\" alt=\"BQ logo\" width=\"35\">\n",
+        "      Open in BQ Studio\n",
+        "    </a>\n",
+        "  </td> \n",
         "</table>"
       ]
     },