support debian 13 (#313)

Allow Debian 13 in the supported distributions

Co-authored-by: damien cavagnini <damien.cavagnini@corp.ovh.com>

Author: damcav35

README.md

@@ -1,4 +1,4 @@
-# :lock: CIS Debian 11/12 Hardening
+# :lock: CIS Debian 11/12/13 Hardening
 
 
 <p align="center">
@@ -13,11 +13,11 @@
 ![License](https://img.shields.io/github/license/ovh/debian-cis)
 ---
 
-Modular Debian 11/12 security hardening scripts based on [cisecurity.org](https://www.cisecurity.org)
+Modular Debian 11/12/13 security hardening scripts based on [cisecurity.org](https://www.cisecurity.org)
 recommendations. We use it at [OVHcloud](https://www.ovhcloud.com) to harden our PCI-DSS infrastructure.
 
-NB : Although Debian 12 CIS Hardening guide is still in development, we do use this set of scripts
-in production at OVHcloud on Debian 12 Operating Systems.
+NB : Although Debian 13 CIS Hardening guide is still in development, we do use this set of scripts
+in production at OVHcloud on Debian 13 Operating Systems.
 
 ```console
 $ bin/hardening.sh --audit-all

lib/constants.sh

@@ -59,4 +59,4 @@ get_debian_major_version
 # shellcheck disable=SC2034
 SMALLEST_SUPPORTED_DEBIAN_VERSION=11
 # shellcheck disable=SC2034
-HIGHEST_SUPPORTED_DEBIAN_VERSION=12
+HIGHEST_SUPPORTED_DEBIAN_VERSION=13