Merge branch 'update/README-to-37' into 'master'

update README.md to 3.7

See merge request !3563

README.md

@@ -70,8 +70,10 @@ please [contact us][6] or open a merge request adding the name.
 # How to cite
 
 DuMu<sup>x</sup> is research software and developed at research institutions.
-You can cite **specific releases** via **Zenodo**:
-[![zenodo badge](https://zenodo.org/badge/DOI/10.5281/zenodo.2479594.svg)](https://doi.org/10.5281/zenodo.2479594).
+You can cite **specific releases** via [**DaRUS**](https://darus.uni-stuttgart.de/dataverse/iws_lh2_dumux) (from 3.6) or **Zenodo**:
+[![zenodo badge](https://zenodo.org/badge/DOI/10.5281/zenodo.2479594.svg)](https://doi.org/10.5281/zenodo.2479594). You can also cite individual code files or even lines via **Software Heritage**: [![sw](https://archive.softwareheritage.org/badge/origin/https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git/)](https://archive.softwareheritage.org/swh:1:dir:e947c9ac369afd90195080e4a06bbde2e1e150ca;origin=https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git;visit=swh:1:snp:3cf49b55de0218903103d428c378e356d7d4d082;anchor=swh:1:rev:11871e4abf619d4cb3f938aedd7a2dea47ce1e87)
+
+
 If you are using DuMu<sup>x</sup> in scientific publications and in
 the academic context, please cite (at least one of)
 our publications:
@@ -107,7 +109,7 @@ our publications:
 
 # Automated Testing / Test suite
 
-* Latest release (3.6): [![release build badge](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/badges/releases/3.6/pipeline.svg)](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/pipelines?page=1&scope=all&ref=releases/3.6)
+* Latest release (3.7): [![release build badge](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/badges/releases/3.7/pipeline.svg)](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/pipelines?page=1&scope=all&ref=releases/3.7)
 * Master branch (development / unstable): [![master build badge](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/badges/master/pipeline.svg)](https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/pipelines?page=1&scope=all&ref=master)