Add service owners for AI (#34997)

* update

* update

Author: xiangyan99

.github/CODEOWNERS

@@ -42,6 +42,9 @@
 # Service team
 ####
 
+# ServiceOwners: @luigiw @needuv @paulshealy1 @singankit
+# ServiceLabel: %AI
+
 # PRLabel: %AI
 /sdk/ai/                                                             @luigiw @needuv @paulshealy1 @singankit
 
@@ -135,7 +138,7 @@
 # PRLabel: %KeyVault
 /sdk/keyvault/                                                       @mccoyp
 
-# PRLabel: %Load Testing
+# PRLabel: %Load Test Service
 /sdk/loadtesting/azure-developer-loadtesting/                        @msyyc @iscai-msft
 
 # PRLabel: %Monitor