[Release] Checkmk stable release 2.3.0p13

[Sara]

Hi @meimler !

We already found the reason, here is the thread where we continue the discussion:

Upgraded to 2.3.0p13.cre - MS teams notification "We're sorry, this card couldn't be displayed"

The linked setup instructions do not help here. We’re getting the same error “We’re sorry, this card couldn’t be displayed” and therefore no more notifications with v2.3.0p13cee Websearch says it is something about the “adaptive card schema version”