[LyX/master] Update layouts

[Jürgen Spitzmüller]

Am Montag, dem 03.06.2024 um 16:00 +0100 schrieb José Matos:
> So I think that for the moment a pragmatic solution is to always
> update
> the layouts when updating the layout format. By reviewing the changes
> we can ensure that the update code does what it should.

I might have misunderstood the discussion, but I got that fixing this
is not too hard, and having something that enforces us to do it is not
too bad. 

-- 
Jürgen