Add DOI for publication of DevOpsDays Berlin 2022 talk about HIFIS, GitLab and DevOps

The DOI of the publication is: 10.5281/zenodo.7248114

Citation:

Hüser, Christian, Ziegner, Norman, & Huste, Tobias. (2022, October 25). Scaling IT Services for Germany's Largest Research Organisation - An Experience Report. DevOpsDays Berlin 2022, Berlin, Germany. Zenodo. https://doi.org/10.5281/zenodo.7248114