scripting: fix javadoc error: reference not found

Change-Id: Ife7bbd704211dd289b6066d541bd4ae0a1788ebf
Reviewed-on: https://gerrit.libreoffice.org/11307
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>