Update Node.js version in "Updating To Homebridge v2.0" example
### Proposed Change

The example code for the `package.json` at the end limits the Node.js version in a way, that doesn't support Node.js version 22. The wiki page was written before Node.js version 22 was supported, but now that it is supported the example code should be modified to reflect that. Otherwise it might lead to confusion or copy & paste errors.

### Wiki Page Link

https://github.com/homebridge/homebridge/wiki/Updating-To-Homebridge-v2.0