Update pin table when model changes.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/19253

eeschema/dialogs/dialog_sim_model.cpp

@@ -470,7 +470,7 @@ void DIALOG_SIM_MODEL<T>::updateWidgets()
     updateBuiltinModelWidgets( model );
     updateModelParamsTab( model );
     updateModelCodeTab( model );
-    updatePinAssignments( model, false );
+    updatePinAssignments( model, model != m_prevModel );
 
     std::string ref = SIM_MODEL::GetFieldValue( &m_fields, SIM_REFERENCE_FIELD );