chore(release): prepare changelog for v0.16.7 (#1975)

Co-authored-by: kai-release-bot <action@github.com>
Signed-off-by: kai-release-bot <action@github.com>

Author: KaiPilotBot

.changes/unreleased/fixed-20260726-152818.yaml

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [v0.16.7] - 2026-07-26
+
+### Fixed
+- Segmented elastic PyTorchJob now respects minReplicas instead of requiring all worker segments
+
 ## [v0.16.6] - 2026-07-23
 
 ### Fixed