[TASK] Update current supported versions in SECURITY.md

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>

SECURITY.md

@@ -3,19 +3,20 @@
 ## Supported Versions
 
 The following matrix shows the versions that are currently maintained
-by the TYPO3 Community. Sprint releases (versions before 10.4.0 and
-before 9.5.0, in their corresponding branches) are not maintained nor
+by the TYPO3 Community. Sprint releases (versions before 11.5.0 and
+before 10.4.0, in their corresponding branches) are not maintained nor
 supported.
 
 | Version         | Supported          |
 | --------------- | ------------------ |
+|          11.5.x | :white_check_mark: |
+|          11.4.x | :x:                |
+|          11.3.x | :x:                |
+|          11.2.x | :x:                |
+|          11.1.x | :x:                |
+|          11.0.x | :x:                |
 |          10.4.x | :white_check_mark: |
-|          10.3.x | :x:                |
-|          10.2.x | :x:                |
-|          10.1.x | :x:                |
-|          10.0.x | :x:                |
-|           9.5.x | :white_check_mark: |
-|         < 9.5.0 | :x:                |
+|        < 10.4.0 | :x:                |
 
 ## Reporting a Vulnerability