Custom Buttons example in docs does not work properly

[jarikmarwede]

The demo for the custom button example on the Popover Buttons documentation page does not work. It does not have the custom "Go to first" button that is shown in the example code.

The reason for that is

driver.js/docs/src/components/CodeSample.tsx

Line 56 in 9b3243f

config!.onPopoverRendered = attachFirstButton;

which still uses onPopoverRendered which was renamed to onPopoverRender.

[jarikmarwede]

By the way, onPopoverRendered is also still mentioned on the homepage of https://driverjs.com in the "Customizing Popover" example.

I have created a PR that fixes both of the remaining mentions of the old hook name in #544.

[kamranahmedse]

Thank you @jarikmarwede 🙏