Prepare for Feb 2023 Release (Azure#33424)

* Update version

* Update changelog

* Use imperative

* Remove internal change

* Update

Co-authored-by: Trask Stalnaker <[email protected]>

---------

Co-authored-by: Trask Stalnaker <[email protected]>

Author: heyams

sdk/monitor/azure-monitor-opentelemetry-exporter/CHANGELOG.md

@@ -1,14 +1,13 @@
 # Release History
 
-## 1.0.0-beta.7 (Unreleased)
+## 1.0.0-beta.7 (2023-02-09)
 
-### Features Added
+### Enhancements
+- Updated the OpenTelemetry SDK baseline to version 1.20.0
+- Replace System.getenv usage with Azure SDK Configuration
 
 ### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Change the Exporter implementations from public to package-private
 
 ## 1.0.0-beta.6 (2022-09-06)