update work group meeting calendar

Author: pahmann

README.md

@@ -1,11 +1,11 @@
 # ELISA Systems Working Group
 The Systems WG aims to enable other working groups within ELISA to put their safety claims towards Linux in a wider system context. This is done in the form of a reproducible reference system based on real-world architectures, implemented fully based on Open-Source technologies. The Systems WG encourages interactions with other projects, which either also help enable safety use cases with Open-Source software or plan to make use of mixed-criticality system elements as a base for their product lines.
 
-The working group meets almost every week on Mondays (16:00 UTC, or during DST at 15:00 UTC).
-- The meeting invitation is send out via mailing list and can be depicted from the ELISA public meeting calendar.
+The working group meets almost every week.
+- The meeting invitation is send out via mailing list
+- The meeting series is listed in the [ELISA public meeting calendar](https://elisa.tech/community/meetings/).
 - The minutes of meeting are kept within the repo wiki: https://github.com/elisa-tech/wg-systems/wiki#meetings
 
-
 **We always welcome interested people and (potential) contributors.**
 
 ## Resources and links