Add missing admin locales

We'll need to check these names with the policy team, I just went for
what seemed reasonable!

config/locales/en.yml

@@ -830,6 +830,8 @@ en:
     feedback_email: "[email protected]"
     support_email_address: "[email protected]"
     claim_subject: "Further education payment"
+    policy_acronym: "TRIP"
+    policy_short_name: "Targeted Retention Incentive Payment For Further Education Teachers"
     admin:
       task_questions:
         provider_verification: