Replace effect code with `useEffect`

[vegetabill]

This logic check belongs in a useEffect hook

Moodify/client/src/components/AvatarPage.js

Lines 23 to 27 in 6a88559

	if (mood && !affirmations.length) {
	getAffirmations();
	} else if (affirmations[0].mood_id !== mood.id) {
	getAffirmations();
	}