Fix Rainier notebook for new API

Author: danshapero

notebooks/rainier.ipynb

@@ -300,9 +300,9 @@
    "outputs": [],
    "source": [
     "fns = [\n",
-    "    model.MinimizationForm.viscous_power,\n",
-    "    model.MinimizationForm.friction_power,\n",
-    "    model.MinimizationForm.momentum_balance,\n",
+    "    model.minimization.viscous_power,\n",
+    "    model.minimization.friction_power,\n",
+    "    model.minimization.momentum_balance,\n",
     "]"
    ]
   },