Update wiki article https://github.com/Daveiano/weewx-wdc/wiki/Support-for-weewx-DWD

[roe-dl]

Within the last few months there were some major updates of weewx-DWD. Some functions described in Support for weewx-DWD wiki page are deprecated now and replaced by an easier way to set up and configure. Furthermore there are new functions and support for more weather services, for example KNMI, OpenWeather, and EUMETSAT.