updated changelog for the 6.5.5 release
@@ -8,6 +8,8 @@ Versioning](http://semver.org/spec/v2.0.0.html).
## Unreleased
+## [6.5.5] - 2021-11-18
+
### Added
- Added objectives (0.5, 0.9, 0.99) to `graphql_duration_seconds` metric.
- Added `graphql_duration_seconds`, `graphql_duration_seconds_sum` &
