Revert "fix: serialization error due to non-transient variable inside…

… serializable class"

This reverts commit b80a3cf.

to avoid breaking change

api/src/main/java/jakarta/xml/ws/Holder.java

@@ -25,7 +25,7 @@ public final class Holder<T> implements Serializable {
     /**
      * The value contained in the holder.
      */
-    public transient T value;
+    public T value;
 
     /**
      * Creates a new holder with a {@code null} value.