Update automatic_model_refresh.ipynb

examples/notebooks/beam-ml/automatic_model_refresh.ipynb

diff --git a/examples/notebooks/beam-ml/automatic_model_refresh.ipynb b/examples/notebooks/beam-ml/automatic_model_refresh.ipynb
index b0e9bc2..54fb16b 100644
--- a/examples/notebooks/beam-ml/automatic_model_refresh.ipynb
+++ b/examples/notebooks/beam-ml/automatic_model_refresh.ipynb
@@ -57,7 +57,7 @@
         "\n",
         "<table align=\"left\">\n",
         "  <td>\n",
-        "    <a target=\"_blank\" href=\"https://colab.sandbox.google.com/github/apache/beam/blob/master/examples/notebooks/beam-ml/automatic_model_refresh.ipynb\"><img src=\"https://raw.githubusercontent.com/google/or-tools/main/tools/colab_32px.png\" />Run in Google Colab</a>\n",
+        "    <a target=\"_blank\" href=\"https://colab.research.google.com/github/apache/beam/blob/master/examples/notebooks/beam-ml/automatic_model_refresh.ipynb\"><img src=\"https://raw.githubusercontent.com/google/or-tools/main/tools/colab_32px.png\" />Run in Google Colab</a>\n",
         "  </td>\n",
         "  <td>\n",
         "    <a target=\"_blank\" href=\"https://github.com/apache/beam/blob/master/examples/notebooks/beam-ml/automatic_model_refresh.ipynb\"><img src=\"https://raw.githubusercontent.com/google/or-tools/main/tools/github_32px.png\" />View source on GitHub</a>\n",