Incorrect code snippet for ic-dialog

[GCHQ-Developer-741]

Summary of the bug

The code snippet for ic-dialog, under the "Interactive Content" heading, the React example should include an onIcDialogConfirmed event listener.

🧐 Expected behaviour

<IcDialog ref={dialogEl} label="Coffee order"
  heading="Please agree to our terms and conditions"
  onIcDialogConfirmed={termsDialogConfirmed}
>

[MI6-255]

Is this done @MI6-94 ?

[MI6-94]

@MI6-255 did not complete, return to 'ready for dev'

[GCHQ-Developer-741]

Completed as part of a seperate check of the code examples