docs: add release notes.

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

docs/release-notes/release-notes-0.19.0.md

@@ -74,6 +74,13 @@
   This is a protocol gadget required for Dynamic Commitments and Splicing that
   will be added later.
 
+* [Deprecated `ChanId`](https://github.com/lightningnetwork/lnd/pull/9390) and
+  introduced `ShortChanIdInt`,reflecting its role as the integer representation
+  of `ShortChannelID`. Added `ShortChanId` as a string representation of
+  `ShortChannelId` in the format (`block x transaction x output`). Introduced
+  `ChannelId` to align with the BOLT-2 Peer Protocol specification for
+  standardized channel identification.
+
 ## Functional Enhancements
 * [Add ability](https://github.com/lightningnetwork/lnd/pull/8998) to paginate 
  wallet transactions.
@@ -274,6 +281,7 @@ The underlying functionality between those two options remain the same.
 * hieblmi
 * Jesse de Wit
 * Keagan McClelland
+* Nishant Bansal
 * Oliver Gugger
 * Pins
 * Viktor Tigerström