Add the change to when we escape backslashes (for the template lookup plugin) to changelog

This was slated for 2.3.3 but after talking with kustodian we decided it
wasn't appropriate for a minor release.  So 2.4.0 is where it appeared

CHANGELOG.md

@@ -326,6 +326,8 @@ Ansible Changes By Release
 * Windows modules now support the use of multiple shared module_utils files in the form of Powershell modules (.psm1), via `#Requires -Module Ansible.ModuleUtils.Whatever.psm1`
 * Python module argument_spec now supports custom validation logic by accepting a callable as the `type` argument.
 * Windows become_method: runas now works across all authtypes and will auto-elevate under UAC if WinRM user has "Act as part of the operating system" privilege
+* Do not escape backslashes in the template lookup plugin to mirror what the template module does
+  https://github.com/ansible/ansible/issues/26397
 
 ### Deprecations
 * The behaviour when specifying `--tags` (or `--skip-tags`) multiple times on the command line
@@ -920,7 +922,6 @@ Ansible Changes By Release
 ### Bugfixes
 * Fix alternatives module handlling of non existing options
 * Fix synchronize traceback with the docker connection plugin
-* Do not escape backslashes in the template lookup plugin to mirror what the template module does
 * Fix the expires option of the postgresq_user module
 * Fix for win_acl when settings permissions on registry objects that use `ALL APPLICATION PACKAGES` and `ALL RESTRICTED APPLICATION PACKAGES`
 * Python3 fixes