[python] Update CODEOWNERS for AppConfig service (#34773)

Author: avanigupta

.github/CODEOWNERS

@@ -468,7 +468,7 @@
 #/<NotInRepo>/          @antcp @AzureAppServiceCLI
 
 # ServiceLabel: %App Configuration %Service Attention
-#/<NotInRepo>/          @shenmuxiaosen @avanigupta
+#/<NotInRepo>/          @albertofori @avanigupta @mrm9084
 
 # ServiceLabel: %ARO %Service Attention
 #/<NotInRepo>/          @mjudeikis @jim-minter @julienstroheker @amanohar