indexer-agent: Update changelog ahead of release

Author: Jannis

packages/indexer-agent/CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Fix how query fee threshold is passed to claimable allocations query
 
 ## [0.9.2] - 2021-01-09
 ### Added