[#3667] update SECURITY.md file

Author: wwencel

.gitlab/issue_templates/release_checklist.md

@@ -23,6 +23,8 @@ Some of these checks and updates can be made before the actual freeze. For new s
 1. [ ] Check [Performance Test Results](https://jenkins.aws.isc.org/job/kea-dev/job/performance/lastSuccessfulBuild/artifact/qa-dhcp/kea/performance-jenkins/report.html) in Jenkins for drops in performance.
 1. [ ] Create a Gitlab issue for bumping up library versions and `KEA_HOOKS_VERSION` and notify developers.
    * In case of no developers available, it can be done by running: [./tools/bump-lib-versions.sh](https://gitlab.isc.org/isc-projects/kea/-/blob/master/tools/bump-lib-versions.sh) Kea-q.w.e Kea-a.b.c (where `a.b.c` is the version to be released and `q.w.e` is the version previous to that).
+1. [ ] If this is stable release:
+   * Check SECURITY.md file create ticket if changes are required.
 1. [ ] Look at the issue numbers in the commit descriptions. Add to ChangeLog a mention of any change with visible impact that had not been mentioned already.
 1. [ ] If any changes have been made to database schemas, then:
    1. [ ] Check that a previously released schema has not been changed.

SECURITY.md

@@ -6,11 +6,13 @@ The following versions are supported:
 
 | Version | Supported          | End-Of-Life                      |
 | ------- | ------------------ | -------------------------------- |
-| 2.5.x   | :white_check_mark: | summer 2024, on release of 2.6.0 |
-| 2.4.x   | :white_check_mark: | summer 2025, on release of 2.8.0 |
-| 2.3.x   | :x:                | July 2023, on release of 2.4.0   |
-| 2.2.x   | :white_check_mark: | August 2024, on release of 2.6.0 |
-| 2.1.x   | :x:                | July 2022, on release of 2.2.0   |
+| 2.7.x   | :white_check_mark: | summer 2025, on release of 3.0.0 |
+| 2.6.x   | :white_check_mark: | summer 2026, on release of 3.2.0 |
+| 2.5.x   | :x:                | June 2024                        |
+| 2.4.x   | :white_check_mark: | summer 2025, on release of 3.0.0 |
+| 2.3.x   | :x:                | July 2023                        |
+| 2.2.x   | :x:                | August 2024, on release of 2.6.0 |
+| 2.1.x   | :x:                | July 2022                        |
 | 2.0.x   | :x:                | August 2023, on release of 2.4.0 |
 | 1.9.0   | :x:                | September 2021                   |
 | 1.8.0   | :x:                | July 2022                        |