docs(changelog): stack panes command

Author: imsnif

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 * fix(layout-applier): logical index pane sorting (https://github.com/zellij-org/zellij/pull/3893)
 * fix(terminal): synchronized rendering detection query response (https://github.com/zellij-org/zellij/pull/3884)
 * fix(terminal): cursor overflow issue (https://github.com/zellij-org/zellij/pull/3894)
+* feat(ux): stack panes command (https://github.com/zellij-org/zellij/pull/3905)
 
 ## [0.41.2] - 2024-11-19
 * fix(input): keypresses not being identified properly with kitty keyboard protocol in some terminals (https://github.com/zellij-org/zellij/pull/3725)