Code update

PiperOrigin-RevId: 874153055

Author: lukmaz

demo/Meridian_Getting_Started.ipynb

@@ -411,7 +411,7 @@
         "from meridian.model import model\n",
         "from meridian.model import prior_distribution\n",
         "from meridian.model import spec\n",
-        "from schema.serde import meridian_serde\n",
+        "from meridian.schema.serde import meridian_serde\n",
         "import numpy as np\n",
         "import pandas as pd\n",
         "# check if GPU is available\n",