[Identity] update test.yml to use the updated ubuntu keyring container (Azure#17985)

* [Identity] update test.yml to use the updated ubuntu keyring container

* updating to latest image

* update container again

Author: schaabs

sdk/identity/tests.yml

@@ -3,7 +3,7 @@ trigger: none
 resources:
   containers:
     - container: 'ubuntu_netcore_keyring'
-      image: 'azsdkengsys.azurecr.io/dotnet/ubuntu_netcore_keyring:523386'
+      image: 'azsdkengsys.azurecr.io/dotnet/ubuntu_netcore_keyring:689585'
       endpoint: 'azsdkengsys'
       options: -ti --cap-add=IPC_LOCK