Change avatar size on form hints (#6707)

config/locales/devise.tr.yml

config/locales/simple_form.ar.yml

config/locales/simple_form.bg.yml

config/locales/simple_form.ca.yml

config/locales/simple_form.de.yml

config/locales/simple_form.en.yml

config/locales/simple_form.eo.yml

config/locales/simple_form.es.yml

config/locales/simple_form.fi.yml

config/locales/simple_form.fr.yml

config/locales/simple_form.gl.yml

config/locales/simple_form.he.yml

config/locales/simple_form.hr.yml

config/locales/simple_form.hu.yml

config/locales/simple_form.id.yml

config/locales/simple_form.io.yml

config/locales/simple_form.it.yml

config/locales/simple_form.ja.yml

config/locales/simple_form.ko.yml

config/locales/simple_form.nl.yml