f - use public type in changelog

Author: jkczyz

pending_changelog/3139-bolt12-compatability.txt

@@ -1,8 +1,8 @@
 ## Backwards Compatibility
  * BOLT12 `Offers` created in prior versions are still valid but are at risk of
    de-anonymization attacks.
- * BOLT12 outbound payments in state `PendingOutboundPayment::AwaitingInvoice`
-   are considered invalid by `ChannelManager`. Any invoices received through the
+ * BOLT12 outbound payments in state `RecentPaymentDetails::AwaitingInvoice` are
+   considered invalid by `ChannelManager`. Any invoices received through the
    corresponding `InvoiceRequest` reply path will be ignored.
  * BOLT12 `Refund`s created in prior versions with non-empty `Refund::paths` are
    considered invalid by `ChannelManager`. Any invoices sent through those