chore[virtual]: mark java 21 code

protocol/src/main/java/com/zfoo/protocol/util/FastThreadLocalAdapter.java

@@ -24,6 +24,7 @@ public class FastThreadLocalAdapter<T> {
     }
 
     public T get() {
+//        return Thread.currentThread().isVirtual() ? supplier.get() : fastThreadLocal.get();
         return fastThreadLocal.get();
     }
 }