Changelog Modification for core-client and core-rest-pipeline (Azure#15334)

Author: sarangan12

sdk/core/core-client/CHANGELOG.md

@@ -1,7 +1,8 @@
 # Release History
 
-## 1.1.2 (Unreleased)
+## 1.1.2 (2021-05-20)
 
+- Fixed an issue to check for the mandatory parameter in the header and query values. [PR 15278](https://github.com/Azure/azure-sdk-for-js/pull/15278)
 
 ## 1.1.1 (2021-05-06)
 

sdk/core/core-rest-pipeline/CHANGELOG.md

@@ -1,6 +1,8 @@
 # Release History
 
-## 1.1.0-beta.2 (Unreleased)
+## 1.1.0-beta.2 (2021-05-20)
+
+- Fixed an issue to set the `Content-Length` header correctly when using multibyte characters. [PR 15314](https://github.com/Azure/azure-sdk-for-js/pull/15314)
 
 ### Fixed