[DDW-854] Update changelog

Author: renanvalentin

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 ### Features
 
+- Improved startup and shutdown messages ([PR 2770](https://github.com/input-output-hk/daedalus/pull/2770))
 - Implemented "discreet mode" ([PR 2723](https://github.com/input-output-hk/daedalus/pull/2723), [PR 2724](https://github.com/input-output-hk/daedalus/pull/2724), [PR 2725](https://github.com/input-output-hk/daedalus/pull/2725), [PR 2742](https://github.com/input-output-hk/daedalus/pull/2742), [PR 2740](https://github.com/input-output-hk/daedalus/pull/2740), [PR 2756](https://github.com/input-output-hk/daedalus/pull/2756))
 - Updated slider component to only execute onAfterChange if slider had moved ([PR 2766](https://github.com/input-output-hk/daedalus/pull/2766))