Update CHANGELOG (#6103)

CHANGELOG.md

@@ -11,6 +11,7 @@ All notable changes to Gogs are documented in this file.
 - Support syntax highlighting for SAS code files (i.e. `.r`, `.sas`, `.tex`, `.yaml`). [#5856](https://github.com/gogs/gogs/pull/5856)
 - Able to fill in pull request title with a template. [#5901](https://github.com/gogs/gogs/pull/5901)
 - Able to override static files under `public/` directory, please refer to [documentation](https://gogs.io/docs/features/custom_template) for usage. [#5920](https://github.com/gogs/gogs/pull/5920)
+- New API endpoint `GET /admin/teams/:teamid/members` to list members of a team. [#5877](https://github.com/gogs/gogs/issues/5877)
 
 ### Changed