Fix wrong demo address in preparebudget ref #55
Fix wrong demo address in preparebudget ref #55

- replace pivxs default demo address in help preparebudget
- fixes https://github.com/ioncoincore/ion/issues/55

cevap/ion,cevap/ion,cevap/ion,ionomy/ion,ionomy/ion,ionomy/ion,cevap/ion,ionomy/ion,cevap/ion,ionomy/ion,ionomy/ion,cevap/ion