Prep for azcore v1.7.0-beta.2 release (Azure#20972)

Author: jhendrixMSFT

sdk/azcore/CHANGELOG.md

@@ -1,8 +1,6 @@
 # Release History
 
-## 1.7.0-beta.2 (Unreleased)
-
-### Features Added
+## 1.7.0-beta.2 (2023-06-06)
 
 ### Breaking Changes
 > These changes affect only code written against beta version v1.7.0-beta.1
@@ -14,8 +12,6 @@
 ### Bugs Fixed
 * Fixed an issue in `azcore.NewClient()` and `arm.NewClient()` that could cause an incorrect module name to be used in telemetry.
 
-### Other Changes
-
 ## 1.7.0-beta.1 (2023-05-24)
 
 ### Features Added