Update CHANGELOG for PR #57

Author: ponylang-main

CHANGELOG.md

@@ -12,6 +12,7 @@ All notable changes to this project will be documented in this file. This projec
 
 - Add pagination support to search results ([PR #50](https://github.com/ponylang/github_rest_api/pull/50))
 - Add GetOrganizationRepositories ([PR #52](https://github.com/ponylang/github_rest_api/pull/52))
+- Add GetRepositoryIssues with paginated issue listing ([PR #57](https://github.com/ponylang/github_rest_api/pull/57))
 
 ### Changed