docs/release-notes: add release notes for taproot chans

docs/release-notes/release-notes-0.17.0.md

@@ -1,9 +1,14 @@
 # Release Notes
 
-## BOLT Specs
+## Protocol Features
 
-* The `lnwire` library is now able to [parse messages for the new experimental
-  taproot channels spec proposal](https://github.com/lightningnetwork/lnd/pull/7331).
+* This release marks the first release that includes the new [musig2-based
+  taproot channel type](https://github.com/lightningnetwork/lnd/pull/7904). As
+  new protocol feature hasn't yet been finalized, users must enable taproot
+  channels with a new flag: `--protocol.simple-taproot-channels`. Once enabled,
+  user MUST use the explicit channel type to request the taproot channel type
+  (pending support by the remote peer). For `lncli openchannel`,
+  `--channel_type=taproot` should be used.
 
 ## DB