Update for KeyVault CODEOWNERS (Azure#51578)

* Update for KeyVault CODEOWNERS

This adds the `azure-sdk-write-keyvault` team as code owners.

* Update .github/CODEOWNERS

* Update .github/CODEOWNERS

---------

Co-authored-by: Jesse Squire <[email protected]>

Author: adarce

.github/CODEOWNERS

@@ -563,11 +563,10 @@
 # ServiceOwners:                                                   @Azure/azure-iot-cli-triage
 
 # PRLabel: %KeyVault
-/sdk/keyvault/                                                     @jorgerangel-msft @jsquire @christothes
+/sdk/keyvault/                                                     @Azure/azure-sdk-write-keyvault
 
 # ServiceLabel: %KeyVault
-# AzureSdkOwners:                                                  @jorgerangel-msft
-# ServiceOwners:                                                   @cheathamb36 @chen-karen
+# ServiceOwners:                                                   @cheathamb36 @chen-karen @Azure/azure-sdk-write-keyvault
 
 # ServiceLabel: %Kubernetes Configuration
 # ServiceOwners:                                                   @NarayanThiru