message: docs(readme): use graph instead of chart
diff: @@ -93,7 +93,7 @@ You can create your own CSS rules or pass style properties to the components.
  #### Using classnames
  -Since we are using DOM nodes for rendering the chart you can simply overwrite the styles with your own CSS rules.
  +Since we are using DOM nodes for rendering the graph you can simply overwrite the styles with your own CSS rules.
  The React Flow wrapper has the className `react-flow`. So if you want to change the graph background for example you can do:
  ```css
  