Updated link to cs3 abstract (SnS)

mission/publications.md

@@ -15,7 +15,7 @@ excerpt:
 
 
 #### Abstracts, Presentations, News
-* [HIFIS: Sync&Share Federation for Helmholtz](https://nubes.helmholtz-berlin.de/s/HWiR3ne6BkTWNgz). In: [CS3 2021 - Cloud Storage Synchronization and Sharing](https://indico.cern.ch/event/970232/program).
+* [HIFIS: Sync&Share Federation for Helmholtz](https://indico.cern.ch/event/970232/contributions/4157924/). In: [CS3 2021 - Cloud Storage Synchronization and Sharing](https://indico.cern.ch/event/970232/program).
 * HIFIS presentations at [EGI conference](https://indico.egi.eu/event/5000/overview) (2-5 November 2020):
   - [Helmholtz Federated IT and Accessible Compute Resources for Applied AI Research](https://indico.egi.eu/event/5000/contributions/14353/)
   - [HIFIS transfer service: FTS for everyone](https://indico.egi.eu/event/5000/contributions/14383/)