update publications, insert clickable reference for software

a) enhance publications list and

b) put a clickable headline for software publications at the top so visitors will see this section as imho no one scrolls down to the end of the publications to look for another section

closes !560 (merged)

view here

edit here

publications.md

@@ -17,7 +17,7 @@ excerpt:
 ##### 2022
 
 * **Research Software Development @Helmholtz**, MPG Worskhop Future Opportunities for Software in Research (FORS2022), May 2022.
-* [**From License Consultation to Software Spotlights**](https://doi.org/10.5281/zenodo.6248895), RDA Deutschland Conference, February 2022, DOI: 10.5281/zenodo.6248895
+* [**From License Consultation to Software Spotlights**](https://doi.org/10.5281/zenodo.6248895), RDA Deutschland Conference, February 2022, DOI: 10.5281/zenodo.6248895.
 * [**OpenSource im Spannungsfeld akademischer und wirtschaftlicher Interessen**](https://www.youtube.com/watch?v=IsOCFNHTHuU), Software Engineering Conference Deutschland (rSE22), February 2022.
 * [**Helmholtz Federated IT Services: Innovative Cloud and Software Services for
 Science**](https://www.youtube.com/watch?v=4T1oyoEPUpE). In: Software Engineering (SE) 2022, Track rSE 22, February 2022.