updating changelog for release (Azure#17592)

Author: seankane-msft

sdk/azcore/CHANGELOG.md

@@ -1,16 +1,11 @@
 # Release History
 
-## 0.23.1 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 0.23.1 (2022-04-14)
 
 ### Bugs Fixed
 * Include XML header when marshalling XML content.
 * Handle XML namespaces when searching for error code.
-
-### Other Changes
+* Handle `odata.error` when searching for error code.
 
 ## 0.23.0 (2022-04-04)