Update CHANGELOG to prepare for 1.0.0b6 release
# Release History
-## 1.0.0b6 (Unreleased)
+## 1.0.0b6 (2022-06-10)
### Features Added
- Implement log exporter using experimental OT logging sdk
- Update to OpenTelemetry api/sdk 1.12.0rc1
([#24619](https://github.com/Azure/azure-sdk-for-python/pull/24619))
-### Bugs Fixed
-
-### Other Changes
-
## 1.0.0b5 (2021-10-05)
### Features Added
