Adopt alternate J.Modifier constructor

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/MXBeanRule.java

@@ -111,7 +111,7 @@ public J.ClassDeclaration visitClassDeclaration(J.ClassDeclaration classDeclarat
             modifiers.removeIf(modifier -> modifier.getType() == Modifier.Type.Private ||
                     modifier.getType() == Modifier.Type.Protected ||
                     modifier.getType() == Modifier.Type.Abstract);
-            modifiers.add(new J.Modifier(randomId(), Space.EMPTY, Markers.EMPTY, Modifier.Type.Public, emptyList()));
+            modifiers.add(new J.Modifier(randomId(), Space.EMPTY, Markers.EMPTY, null, Modifier.Type.Public, emptyList()));
             return maybeAutoFormat(cd, cd.withModifiers(sortModifiers(modifiers)), ctx);
         }
     }