fix: seed PNVO pipe series pressure

tests/test_thermofluid_closure_plan.py

@@ -360,7 +360,7 @@ class ThermofluidClosurePlanTests(unittest.TestCase):
             )
         ]
 
-        self.assertEqual(len(series_solver._pnor_pnl0001_series_plan), 1)
+        self.assertEqual(len(series_solver._resistance_pnl0001_series_plan), 1)
         self.assertEqual(len(closed_pipe_solver._closed_resistance_pressure_plan), 2)
         self.assertEqual(len(resistance_solver._closed_resistance_pressure_plan), 1)