Merge branch 'update-t3olayout-2-3-1' into 'develop'

[TASK] Update t3olayout to 2.3.1

See merge request t3o/typo3.org!177
3 jobs for develop in 10 minutes and 26 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #7773
build

00:01:58

 
  Layout
passed #7774
layout

00:07:06

 
  Deploy
passed #7775
deploy-develop

00:01:21