Supported versions by the community has been changed
after v11 LTS has been released, Furthermore v9 has
shifted into ELTS and is no longer supported by the
community.

This patch updates the version matrix in SECURITY.md
to reflect these changes, as this is for ex. displayed
on github as security policy.

Resolves: #95604
Releases: master
Change-Id: Ie12b1d1dd52fbca7b443bb17b0033379175866ac
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71595


Tested-by: Simon Gilli <typo3@gilbertsoft.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Simon Gilli <typo3@gilbertsoft.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>