[CERN IPMC] update available

Hooray, a new version of Discourse is available!

Your version: 2.9.0.beta12
New version: 2.9.0.beta13

Release notes

Read about this release here:

https://meta.discourse.org/t/2-9-0-beta13-security-fixes-sidebar-improvements-new-api-scopes-and-more/246872

This release includes security fixes.