[CERN IPMC] update available

Hooray, a new version of Discourse is available!

Your version: 2.9.0.beta11
New version: 2.9.0.beta12

Release notes

Read about this release here:

https://meta.discourse.org/t/2-9-0-beta12-security-fix-bug-fixes-and-more/245469

This release includes security fixes, so please update.