Horizon 2.8.3 CHANGELOG (#3950)

services/horizon/CHANGELOG.md

@@ -3,7 +3,10 @@
 All notable changes to this project will be documented in this
 file. This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## v2.8.3
+**Upgrading to this version from <= v2.8.0 will trigger a state rebuild. During this process (which will take at least 10 minutes), Horizon will not ingest new ledgers.**
+
+**In the 2.9.0 Horizon release, the `--ingest` flag will be set to `true` by default.**
 
 * Fix ingestion of fee bump transactions which have muxed source accounts ([3948](https://github.com/stellar/go/pull/3948)).
 * Add an index on trade aggregations, to improve ingestion performance ([3947](https://github.com/stellar/go/pull/3947)).