fixed changelog - [ci skip]

CHANGELOG

@@ -91,15 +91,6 @@ v 8.9.0 (unreleased)
   - Cache on the database if a project has an active external issue tracker.
   - Put project Labels and Milestones pages links under Issues and Merge Requests tabs as subnav
   - GitLab project import and export functionality
-
-v 8.8.5 (unreleased)
-  - Ensure branch cleanup regardless of whether the GitHub import process succeeds
-  - Fix todos page throwing errors when you have a project pending deletion
-  - Reduce number of SQL queries when rendering user references
-  - Import GitHub repositories respecting the API rate limit
-  - Fix importer for GitHub comments on diff
-  - Disable Webhooks before proceeding with the GitHub import
-  - Fix incremental trace upload API when using multi-byte UTF-8 chars in trace
   - All classes in the Banzai::ReferenceParser namespace are now instrumented
   - Remove deprecated issues_tracker and issues_tracker_id from project model
   - Allow users to create confidential issues in private projects