Address review comments

services/horizon/CHANGELOG.md

@@ -9,17 +9,18 @@ file. This project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
-- Bump XDR for protocol 21 ([5282](https://github.com/stellar/go/pull/5282)), ([5275](https://github.com/stellar/go/pull/5275))
+- Bump XDR for [protocol 21](https://github.com/stellar/stellar-xdr/releases/tag/v21.0)
 - Make reaping batch sizes configurable via `--history-retention-reap-count` ([5272](https://github.com/stellar/go/pull/5272))
 - Log tx meta when ingestion failures occur ([5268](https://github.com/stellar/go/pull/5268))
 - Add deprecation warning for `--captive-core-use-db` ([5231](https://github.com/stellar/go/pull/5231))
 
 ### Fixed
 -  Optimized reingestion by addressing performance slowdown due to unnecessary operations on `history_transactions_filtered_tmp`. Removed obsolete `EnableIngestionFiltering` flag. ([5278](https://github.com/stellar/go/pull/5278))
-- Reduce memory consumption of CheckpointChangeReader during state verification and state rebuild ([5270](https://github.com/stellar/go/pull/5270))
 - Fix deadlock in parallel ingestion ([5263](https://github.com/stellar/go/pull/5263))
 - Add missing tables to TruncateIngestStateTables() ([5253](https://github.com/stellar/go/pull/5253))
-- Remove unnecessary use of ChangeCompactor to reduce memory bloat during ingestion ([5252](https://github.com/stellar/go/pull/5252))
+- Performance improvements in ingest library
+    - Reduce memory consumption of CheckpointChangeReader during state verification and state rebuild ([5270](https://github.com/stellar/go/pull/5270))
+    - Remove unnecessary use of ChangeCompactor to reduce memory bloat during ingestion ([5252](https://github.com/stellar/go/pull/5252))
 
 ## 2.29.0