doc: update release notes

docs/release-notes/release-notes-0.18.0.md

@@ -78,6 +78,9 @@
   running this new version, please make sure to upgrade your client application
   to include this new status so it can understand the RPC response properly.
   
+* Adds a new rpc endpoint gettx to the walletrpc sub-server to [fetch 
+  transaction details](https://github.com/lightningnetwork/lnd/pull/7654).
+
 ## lncli Additions
 
 # Improvements
@@ -175,6 +178,7 @@
 * Andras Banki-Horvath
 * Carla Kirk-Cohen
 * Elle Mouton
+* ErikEk
 * Keagan McClelland
 * Marcos Fernandez Perez
 * Matt Morehouse