Very minor README spelling error fix
Very minor README spelling error fix

MichMich/MagicMirror,roramirez/MagicMirror,roramirez/MagicMirror,MichMich/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,n8many/MagicMirror,Tyvonne/MagicMirror,MichMich/MagicMirror,Tyvonne/MagicMirror,Tyvonne/MagicMirror,MichMich/MagicMirror,Tyvonne/MagicMirror,roramirez/MagicMirror,roramirez/MagicMirror