Update CHANGELOG for release v3.8.3

Author: FGadvancer

CHANGELOG/CHANGELOG-3.8.md

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+## [v3.8.3](https://github.com/openimsdk/openim-sdk-core/releases/tag/v3.8.3) 	(2025-01-08)
+
+### New Features
+* feat: merge main bug fix to main. [#637](https://github.com/openimsdk/openim-sdk-core/pull/637)
+* feat: improve merge in milestone and merged handle logic. [Created [#797](https://github.com/openimsdk/openim-sdk-core/pull/797)
+* feat: add a function to quickly retrieve the context messages for a given message. [#828](https://github.com/openimsdk/openim-sdk-core/pull/828)
+
+### Bug Fixes
+* fix: create index failed when table name has `-`. [Created [#795](https://github.com/openimsdk/openim-sdk-core/pull/795)
+* fix: change the table name and add escaping. [Created [#803](https://github.com/openimsdk/openim-sdk-core/pull/803)
+* fix: change errs to custom errs avoid sdk panic. [Created [#802](https://github.com/openimsdk/openim-sdk-core/pull/802)
+* fix: get reverse history message change. [#805](https://github.com/openimsdk/openim-sdk-core/pull/805)
+* fix: add server isEnd determination criteria for message retrieval. [#812](https://github.com/openimsdk/openim-sdk-core/pull/812)
+* fix: login user's info maybe empty when app reinstall. [#816](https://github.com/openimsdk/openim-sdk-core/pull/816)
+* fix: search message do not filter voice message when keyword is empty. [#820](https://github.com/openimsdk/openim-sdk-core/pull/820)
+* fix: quote message change to revoke message when app from background … [#826](https://github.com/openimsdk/openim-sdk-core/pull/826)
+
+### Refactors
+* refactor: add a parameter to locate messages and reverse pull messages to avoid UI data interference. [#833](https://github.com/openimsdk/openim-sdk-core/pull/833)
+* refactor: remove fetch messages instead of search message clear cache. [#835](https://github.com/openimsdk/openim-sdk-core/pull/835)
+
+### Builds
+* build: update PR body. [Created [#798](https://github.com/openimsdk/openim-sdk-core/pull/798)
+
+### Others
+* bump: update go mod dependency version to latest. (#632) [#633](https://github.com/openimsdk/openim-sdk-core/pull/633)
+* merge: update release-v3.8 with main changes [#735](https://github.com/openimsdk/openim-sdk-core/pull/735)
+
+**Full Changelog**: [v3.8.2...v3.8.3](https://github.com/openimsdk/openim-sdk-core/compare/v3.8.2...v3.8.3)
+

CHANGELOG/README.md

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+# CHANGELOGs
+
+- [CHANGELOG-3.8.md](./CHANGELOG-3.8.md)
+