Changed account notifications enum types

* migration_scheduled > scheduled_migration
* migration_pending > pending_migration

Author: Josh Sager

src/data/objects/notification.yaml

@@ -49,8 +49,8 @@ enums:
     important_ticket: There is a ticket open on your account that requires your attention.
     abuse_ticket: There is an abuse-related ticket on your account that requires your attention.
     outage: There is a known outage impacting one or more of your services.
-    pending_migration: There is a migration queued for one of your Linodes that you must initiate.
-    scheduled_migration: There is a migration queued for one of your Linodes.
+    migration_pending: There is a migration queued for one of your Linodes that you must initiate.
+    migration_scheduled: There is a migration queued for one of your Linodes.
     outstanding_balance: You have a balance on your account that must be paid.
     xsa: You have a Linode impacted by a Xen Security Advisory which will require migration.
     scheduled_reboot: There is a reboot queued for one of your Linodes.