[trivial] update javadoc on Builder.java

src/core/lombok/Builder.java

@@ -32,8 +32,8 @@ import java.lang.annotation.Target;
  * that contains a member which is annotated with {@code @Builder}.
  * <p>
  * If a member is annotated, it must be either a constructor or a method. If a class is annotated,
- * then a private constructor is generated with all fields as arguments
- * (as if {@code @AllArgsConstructor(access = AccessLevel.PRIVATE)} is present
+ * then a package-private constructor is generated with all fields as arguments
+ * (as if {@code @AllArgsConstructor(access = AccessLevel.PACKAGE)} is present
  * on the class), and it is as if this constructor has been annotated with {@code @Builder} instead.
  * Note that this constructor is only generated if you haven't written any constructors and also haven't
  * added any explicit {@code @XArgsConstructor} annotations. In those cases, lombok will assume an all-args