Fix import paths in Meridian Scenario Planner notebook.

PiperOrigin-RevId: 874635928

Author: riemanli

demo/Meridian_Scenario_Planner_Beta.ipynb

@@ -175,11 +175,11 @@
         "from meridian.model import prior_distribution\n",
         "from meridian.model import spec\n",
         "\n",
-        "from schema.processors import model_fit_processor\n",
-        "from schema.processors import marketing_processor\n",
-        "from schema.processors import budget_optimization_processor\n",
-        "from schema.utils import date_range_bucketing\n",
-        "from schema.serde import meridian_serde\n",
+        "from meridian.schema.processors import model_fit_processor\n",
+        "from meridian.schema.processors import marketing_processor\n",
+        "from meridian.schema.processors import budget_optimization_processor\n",
+        "from meridian.schema.utils import date_range_bucketing\n",
+        "from meridian.schema.serde import meridian_serde\n",
         "\n",
         "from scenarioplanner.converters import sheets\n",
         "from scenarioplanner.converters.dataframe import dataframe_model_converter\n",