Reply time format changed

Hi,

I just realized that kmail2 6.3.2 uses a long format for inserting the time
including the name of the time zone when replying to an e-mail. Just have a
look at some of the recent answers in this mailing list, e.g. the one from
Martin 2 days ago:

> MERLIN Philippe - 10.03.25, 10:51:05 Mitteleuropäische Normalzeit:

Another e-mail from Martin from 2025-02-12 shows

> Erwan David - 12.02.25, 10:17:00 MEZ:

And of course I see this in my own e-mails as well.

To me it's a little bit annoying that the time zone is spelled out. I use
a workaround and changed the corresponding templates to use '%OTIME' instead
of '%OTIMELONG' but maybe there is a better fix.

Frank