Update to core versions to 11.2.8 and 10.5.6

Migrated issue

Reported by: jonathan1055

Related to !428 (merged)

Problem/Motivation

New core releases for 11 and 10 today, plus security release updates.

https://git.drupalcode.org/issue/gitlab_templates-3557601/-/jobs/7276156#L36

Proposed resolution