changelog: added changes introduced with 2e37aeb

@TarantoolBot document
Title: `tt stop/kill/clean/logrotate` reduce requirements

These commands work correctly:
- For multi-instance app if instance(s) script(s) is missing.
- For tarantool3-based cluster app if cluster config is missing.

Author: elhimov

CHANGELOG.md

@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Changed
 
+- `tt stop/kill/clean/logrotate`: no longer need:
+   * Instances scripts for multi-instance applications.
+   * Cluster config for tarantool3-based cluster applications.
+
 ### Fixed
 
 - `tt coredump inspect`: fails for tarantool-ee coredump archive if the source