include thanos-io#5607 in changelog

Signed-off-by: Ben Ye <ben.ye@bytedance.com>

CHANGELOG.md

@@ -39,7 +39,8 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#5439](https://github.com/thanos-io/thanos/pull/5439) Mixin: Add Alert ThanosQueryOverload to Mixin.
 - [#5342](https://github.com/thanos-io/thanos/pull/5342) Query/Query Frontend: Implement vertical sharding at query frontend for range queries.
 - [#5561](https://github.com/thanos-io/thanos/pull/5561) Query Frontend: Support instant query vertical sharding.
-- [#5453](https://github.com/thanos-io/thanos/pull/5453) Compact: Skip erroneous empty non `*AggrChunk` chunks during 1h downsampling of 5m resolution blocks.
+- [#5453](https://github.com/thanos-io/thanos/pull/5453) Compact: Skip erroneous empty non `*AggrChunk` chunks during 1h downsampling of 5m resolution blocks.- [#5607](https://github.com/thanos-io/thanos/pull/5607) Query: Support custom lookback delta from request in query api.
+- [#5607](https://github.com/thanos-io/thanos/pull/5607) Query: Support custom lookback delta from request in query api.
 
 ### Changed