docs: updating release notes

Author: sergey3bv

docs/release-notes/release-notes-0.8.0.md

@@ -302,6 +302,14 @@
   to `experimental.rfq.skipquoteacceptverify` for improved clarity.
   Update your configuration files to use the new option name.
 
+- [PR#2054](https://github.com/lightninglabs/taproot-assets/pull/2054)
+  ([#1661](https://github.com/lightninglabs/taproot-assets/issues/1661))
+  Renames the optional manual fee field on `SendAssetRequest` from `fee_rate`
+  to `sat_per_vbyte` (REST/JSON: `sat_per_vbyte`, protobuf field number
+  unchanged) to align with the CLI/manual fee input unit in sat/vB. The
+  comment now refers to the anchor transaction rather than minting. gRPC, REST,
+  and any generated clients must use the new field name.
+
 ## Performance Improvements
 
 ## Deprecations