It is because of Right side neck muscle tightness. We call it postural torticolis, it can be completely cure now, if will not treat now, she will adopt this posture. Better to visit nearest pediatric physiotherapist, they can guide you neck muscles stretching & facilitation.
Next Steps
for facilitation show some colourful musical toys from right side. so that she will rotate neck to that side.
Health Tips
carry her in left side it will obstruct rotation & movement towards her left side. then ask someone to call from right or give facilitation... it will be helpful