docs: add release notes

Author: darioAnongba

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

@@ -26,6 +26,11 @@
 
 ## RPC Additions
 
+- The `BurnAsset` RPC now supports a 
+  [new `AssetSpecifier` field](https://github.com/lightninglabs/taproot-assets/pull/1812)
+  that allows the user to  specify the asset to burn by ID or GroupKey.
+  The `asset` field is now deprecated.
+
 ## tapcli Additions
 
 # Improvements
@@ -47,6 +52,10 @@
 
 ## tapcli Updates
 
+- The `tapcli assets burn` command now has a
+  [new `--group_key` flag](https://github.com/lightninglabs/taproot-assets/pull/1812)
+  that allows users to burn assets by group key.
+
 ## Code Health
 
 ## Breaking Changes