Bug 28198: Correct sample HOLD_REMINDER notice for it,nb,pl,ru

Bug 28198: Correct sample HOLD_REMINDER notice for it,nb,pl,ru

It turns out that ea6467724cf8e6fac2224e1dcb6c6ddee73736af also caused the same issue in these locales
Also e0b0e908f767e510c5538d8e5cfb25f994579441 (a follow up) caused the issue in it-IT

== Test plan ==
Paste all this :D
```
 # doesn't work without this patch applied
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/nb-NO/1-Obligatorisk/sample_notices.sql | sudo koha-mysql kohadev
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/pl-PL/mandatory/sample_notices.sql | sudo koha-mysql kohadev
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/ru-RU/mandatory/sample_notices.sql | sudo koha-mysql kohadev
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/it-IT/necessari/notices.sql | sudo koha-mysql kohadev

 # test all the rest
 ## fixed by previous patch, double checking
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/fr-FR/1-Obligatoire/sample_notices.sql | sudo koha-mysql kohadev
 ## was already working, just double checking
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/fr-CA/obligatoire/sample_notices.sql | sudo koha-mysql kohadev
echo "DELETE FROM letter;" | sudo koha-mysql kohadev
cat installer/data/mysql/uk-UA/mandatory/sample_notices.sql | sudo koha-mysql kohadev
```

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>