message: docs(example): use correct id
diff: @@ -81,7 +81,7 @@ class App extends PureComponent {
  { source: '3', target: '4', type: 'step' },
  { source: '3', target: '5' },
  { source: '5', target: '6__b' },
  - { source: '5', target: '6', type: 'step', animated: true, style: { stroke: '#FFCC00' } },
  + { source: '5', target: '6__a', type: 'step', animated: true, style: { stroke: '#FFCC00' } },
  { source: '6', target: '7', style: { stroke: '#FFCC00' }},
  ]
  };
  