[rust highlights] fix scoped attribute macro matching

Without this scoped attribute macros are not matched as macros.
Eg
```
  #[path::macro]
```

Author: theli-ua

runtime/queries/rust/highlights.scm

@@ -273,6 +273,10 @@
 ; ---
 (meta_item
   (identifier) @function.macro)
+(attr_item
+  (scoped_identifier
+    name: (identifier) @function.macro)
+  (token_tree (identifier) @function.macro)?)
 (attr_item
   (identifier) @function.macro
   (token_tree (identifier) @function.macro)?)