Update CHANGELOG to prepare for 1.0.0b8 release
# Release History
-## 1.0.0b8 (Unreleased)
+## 1.0.0b8 (2022-09-26)
### Features Added
- Populate metric namespace with meter instrumentation scope name
([#26257](https://github.com/Azure/azure-sdk-for-python/pull/26257))
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
## 1.0.0b7 (2022-08-12)
### Features Added
