Update CHANGELOG.md

Author: brendan-kellam

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Fixed unary Zoekt searches retaining a gRPC channel after every request by closing each client on completion. [#1591](https://github.com/sourcebot-dev/sourcebot/pull/1591)
+
 ## [5.1.8] - 2026-08-19
 
 ### Added
@@ -20,7 +23,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Upgraded Next.js to 16.3.1 to bound memory retained by high-cardinality dynamic route cache entries. [#1594](https://github.com/sourcebot-dev/sourcebot/pull/1594)
 - Fixed memory leak attributed to CodeMirror allocating objects on heap that were never freed. [#1580](https://github.com/sourcebot-dev/sourcebot/pull/1580)
 - Kept Git provider credentials out of subprocess arguments and on-disk configuration by using isolated in-memory credential caches. [#1584](https://github.com/sourcebot-dev/sourcebot/pull/1584)
-- Fixed unary Zoekt searches retaining a gRPC channel after every request by closing each client on completion. [#1591](https://github.com/sourcebot-dev/sourcebot/pull/1591)
 
 ## [5.1.7] - 2026-08-13