change V1Subject to RbacV1Subject in k8s.py

This change fix: Error: module 'kubernetes.client' has no attribute 'V1Subject'

enterprise_gateway/services/processproxies/k8s.py

@@ -349,7 +349,7 @@ def _create_role_binding(self, namespace: str, service_account_name: str) -> Non
         binding_role_ref = client.V1RoleRef(
             api_group="", kind="ClusterRole", name=kernel_cluster_role
         )
-        binding_subjects = client.V1Subject(
+        binding_subjects = client.RbacV1Subject(
             api_group="", kind="ServiceAccount", name=service_account_name, namespace=namespace
         )