8311098: Change comment in verificationType.hpp to refer to _sym

Reviewed-by: ccheung

src/hotspot/share/classfile/verificationType.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -49,10 +49,10 @@ class ClassVerifier;
 
 class VerificationType {
   private:
-    // Least significant bits of _handle are always 0, so we use these as
-    // the indicator that the _handle is valid.  Otherwise, the _data field
+    // Least significant 2 bits of _sym are always 0, so we use these as
+    // the indicator that _sym is a valid pointer.  Otherwise, the _data field
     // contains encoded data (as specified below).  Should the VM change
-    // and the lower bits on oops aren't 0, the assert in the constructor
+    // and the lower 2 bits of Symbol* aren't 0, the assert in the constructor
     // will catch this and we'll have to add a descriminator tag to this
     // structure.
     union {