⚠️ Webserver URL change! Collecting and updating occurrences in our repos and websites

[jpfeuffer]

The domain of our webserver changed from:

https://abibuilder.informatik.uni-tuebingen.de/

to

https://abibuilder.cs.uni-tuebingen.de/

Please report occurrences of the old URLs and if you know how to, create a PR or make an edit to update them