release note cleanup

RELEASES.txt

@@ -196,10 +196,12 @@ Planned
 * Avoid "out of regs" for large expressions by adding more comprehensive
   register shuffling and indirect variants of several bytecode opcodes
 
-* Change error handler model: error handler is now set explicitly, so
-  there is no errhandler_index argument any more in any protected API
-  calls (this is an incompatible API changes, just remove error handler
-  indices from calls)
+* Change error handler model: error handlers are now set explicitly to
+  Duktape.errcreate and Duktape.errthrow, and can interact with both error
+  creation and error throwing
+
+* Incompatible API change: errhandler_index argument has been removed
+  from all protected API calls as unnecessary
 
 * Add duk_push_heap_stash(), duk_push_global_stash(), and
   duk_push_thread_stash() to provide C code with stashes for storing