Add RWTH Aachen funding (JuliaMolSim#435)

README.md

@@ -59,7 +59,8 @@ As a software DFTK can also be cited via [![DOI](https://zenodo.org/badge/181734
 ## Funding
 This project has received funding from
 the [Institute of computing and data sciences (ISCD, Sorbonne Université)](https://iscd.sorbonne-universite.fr/),
-[École des Ponts ParisTech](https://enpc.fr), [Inria Research Centre Paris](https://www.inria.fr/fr/centre-inria-de-paris)
+[École des Ponts ParisTech](https://enpc.fr), [Inria Research Centre Paris](https://www.inria.fr/fr/centre-inria-de-paris),
+[RWTH Aachen University](https://rwth-aachen.de/),
 and from the European Research Council (ERC) under the European Union's Horizon 2020 research and
 innovation program ([grant agreement No 810367](https://cordis.europa.eu/project/id/810367)).