docs: add release notes

Signed-off-by: Nishant Bansal <[email protected]>

Author: NishantBansal2003

docs/release-notes/release-notes-0.20.0.md

@@ -23,6 +23,14 @@
 # New Features
 
 ## Functional Enhancements
+* [Add](https://github.com/lightningnetwork/lnd/pull/9677)
+  `ConfirmationsUntilActive` and `ConfirmationHeight` field to the
+  `PendingChannelsResponse_PendingChannel` message, providing users with the
+  number of confirmations remaining before a pending channel becomes active and 
+  the block height at which the funding transaction was first confirmed.
+  This change also persists the channel's confirmation height in the database 
+  once its funding transaction receives one confirmation, allowing tracking of 
+  confirmation progress before the channel becomes active.
 
 ## RPC Additions