[LyX/master] HP-Statements example: update

[Jürgen Spitzmüller]

Am Montag, dem 07.02.2022 um 16:36 +0100 schrieb Juergen Spitzmueller:
> commit e071d5fe295f956ccbdc9ca4eb8403badb9f01bc
> Author: Juergen Spitzmueller <spitz at lyx.org>
> Date:   Mon Feb 7 17:07:50 2022 +0100
> 
>     HP-Statements example: update
>     
>     Some of the examples used here seem to be no longer supported by
>     the hpstatement package and lead to errors.

Riki, this could also be backported (I have the changes ready in
stable)

-- 
Jürgen