change name of mood images

public/images/mood/mood-bored-black.svg

public/images/mood/mood-bored.svg

public/images/mood/mood-happy-black.svg

public/images/mood/mood-happy.svg

public/images/mood/mood-pained-black.svg

public/images/mood/mood-pained.svg

public/images/robot_bored.svg

public/images/robot_happy.svg

public/images/robot_sad.svg

src/InteractionTrace/figureElements.js

src/Mood/Mood.js