modify tracestate log was in wrong release
## Unreleased
-- Rename `MetricRecord` class to `ExportRecord`
- ([#1367](https://github.com/open-telemetry/opentelemetry-python/pull/1367))
+- Allow samplers to modify tracestate
+ ([#1319](https://github.com/open-telemetry/opentelemetry-python/pull/1319))
- Add optional parameter to `record_exception` method
([#1314](https://github.com/open-telemetry/opentelemetry-python/pull/1314))
- Update exception handling optional parameters, add escaped attribute to record_exception
([#1365](https://github.com/open-telemetry/opentelemetry-python/pull/1365))
+- Rename `MetricRecord` class to `ExportRecord`
+ ([#1367](https://github.com/open-telemetry/opentelemetry-python/pull/1367))
- Rename Record in Metrics SDK to Accumulation
([#1373](https://github.com/open-telemetry/opentelemetry-python/pull/1373))
- Rename Meter class to Accumulator in Metrics SDK
([#1372](https://github.com/open-telemetry/opentelemetry-python/pull/1372))
+- Rename Meter class to Accumulator in Metrics SDK
+ ([#1372](https://github.com/open-telemetry/opentelemetry-python/pull/1372))
## Version 0.15b0
