docs: add release notes

Author: darioAnongba

docs/release-notes/release-notes-0.7.0.md

@@ -171,6 +171,10 @@
 
 - The `AddrReceives` RPC now supports timestamp filtering with
   [new `StartTimestamp` and `EndTimestamp` fields](https://github.com/lightninglabs/taproot-assets/pull/1794).
+  
+- The `BurnAsset` RPC has a new field `asset` that allows the user to specify
+  the asset to burn by ID or GroupKey. The previous `asset` field is deprecated
+  and renamed as `asset_legacy`.
 
 ## tapcli Additions
 
@@ -189,6 +193,9 @@
 - CLI JSON output [now](https://github.com/lightninglabs/taproot-assets/pull/1821)
   includes unset and zero-valued proto fields (e.g. transaction output indexes).
   This ensures consistent output shape across all proto messages.
+  
+- The `tapcli assets burn` command now has a new flag `--group_key` that
+  allows users to burn assets by group key.
 
 - The `tapcli addrs receives` command now supports 
   [new `--start_timestamp` and `--end_timestamp` flags](https://github.com/lightninglabs/taproot-assets/pull/1794).