Bug 37329: Typo: authorised value in patron attribute types

Bug 37329: Typo: authorised value in patron attribute types

This patch corrects a typo in the patron attribute type form.

Terminology indicates it should be "authorized" and not "authorised".

https://wiki.koha-community.org/wiki/Terminology

To test:
1. Apply patch
2. Go to Administration > Patron attribute types > New patron attribute type
--> The hint next to the Is a date checkbox should say "[...]an authorized
value category"

Signed-off-by: Roman Dolny <roman.dolny@jezuici.pl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>