Update CHANGELOG for release v3.8.3-patch.2 (#3175)

Co-authored-by: icey-yu <119291641+icey-yu@users.noreply.github.com>
Co-authored-by: Monet Lee <monet_lee@163.com>

CHANGELOG/CHANGELOG-3.8.md

@@ -1,3 +1,10 @@
+## [v3.8.3-patch.2](https://github.com/openimsdk/open-im-server/releases/tag/v3.8.3-patch.2) 	(2025-02-28)
+
+### Bug Fixes
+* fix: Offline push does not have a badge && Android offline push (#3146) [#3174](https://github.com/openimsdk/open-im-server/pull/3174)
+
+**Full Changelog**: [v3.8.3-patch.1...v3.8.3-patch.2](https://github.com/openimsdk/open-im-server/compare/v3.8.3-patch.1...v3.8.3-patch.2)
+
 ## [v3.8.3-patch.1](https://github.com/openimsdk/open-im-server/releases/tag/v3.8.3-patch.1) 	(2025-02-25)
 
 ### New Features