doc: release notes

docs/release-notes/release-notes-0.15.0.md

@@ -67,6 +67,12 @@ then watch it on chain. Taproot script spends are also supported through the
   arbitrator relying on htlcswitch to be started
   first](https://github.com/lightningnetwork/lnd/pull/6214).
   
+## Neutrino
+
+* [New neutrino sub-server](https://github.com/lightningnetwork/lnd/pull/5652)
+  capable of status checks, adding, disconnecting and listing
+  peers, fetching compact filters and block/block headers.
+
 * [Added signature length
   validation](https://github.com/lightningnetwork/lnd/pull/6314) when calling
   `NewSigFromRawSignature`.