Update CHANGELOG for release v3.8.3-patch.6 (#3473)

Co-authored-by: FGadvancer <46924906+FGadvancer@users.noreply.github.com>
Co-authored-by: Monet Lee <monet_lee@163.com>

CHANGELOG/CHANGELOG-3.8.md

@@ -1,3 +1,13 @@
+## [v3.8.3-patch.6](https://github.com/openimsdk/open-im-server/releases/tag/v3.8.3-patch.6) 	(2025-07-23)
+
+### Bug Fixes
+* fix: Add friend DB in notification sender [#3438](https://github.com/openimsdk/open-im-server/pull/3438)
+* fix: remove update version file workflows have new line in 3.8.3-patch branch. [#3452](https://github.com/openimsdk/open-im-server/pull/3452)
+* fix: s3 aws init [#3454](https://github.com/openimsdk/open-im-server/pull/3454)
+* fix: use safe submodule init in workflows in v3.8.3-patch. [#3469](https://github.com/openimsdk/open-im-server/pull/3469)
+
+**Full Changelog**: [v3.8.3-patch.5...v3.8.3-patch.6](https://github.com/openimsdk/open-im-server/compare/v3.8.3-patch.5...v3.8.3-patch.6)
+
 ## [v3.8.3-patch.5](https://github.com/openimsdk/open-im-server/releases/tag/v3.8.3-patch.5) 	(2025-06-10)
 
 ### New Features