mgmt, post release 2.12.1 aks (Azure#27235)

Author: weidongxu-microsoft

eng/versioning/version_client.txt

@@ -210,7 +210,7 @@ com.azure.resourcemanager:azure-resourcemanager-cdn;2.12.0;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-compute;2.12.0;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-containerinstance;2.12.0;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-containerregistry;2.12.0;2.13.0-beta.1
-com.azure.resourcemanager:azure-resourcemanager-containerservice;2.12.0;2.13.0-beta.1
+com.azure.resourcemanager:azure-resourcemanager-containerservice;2.12.1;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-cosmos;2.12.0;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-dns;2.12.0;2.13.0-beta.1
 com.azure.resourcemanager:azure-resourcemanager-eventhubs;2.12.0;2.13.0-beta.1

sdk/resourcemanager/azure-resourcemanager-cdn/README.md

@@ -18,7 +18,7 @@ For documentation on how to use this package, please see [Azure Management Libra
 <dependency>
     <groupId>com.azure.resourcemanager</groupId>
     <artifactId>azure-resourcemanager-cdn</artifactId>
-    <version>2.12.0</version>
+    <version>2.12.1</version>
 </dependency>
 ```
 [//]: # ({x-version-update-end})

sdk/resourcemanager/azure-resourcemanager-containerservice/CHANGELOG.md

@@ -2,6 +2,16 @@
 
 ## 2.13.0-beta.1 (Unreleased)
 
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
+## 2.12.1 (2022-02-22)
+
 ### Bugs Fixed
 
 - Fixed a bug that osDiskType on new agent pool is not set during `KubernetesCluster` update.