Fix the leader of UNIMARC sample authority data

Andreas Roussosrequested to merge
a-roussos/koha-misc4dev:fixleader into main

The majority of UNIMARC sample authority records have an extra space at the end of their leader value.

This patch fixes that.

Commands used:

sed -i 's/   4500 <\/leader>/   4500<\/leader>/g' auth_header.sql
sed -E -i 's/([0-9]{5})([cdn])([xyz])  ([a-m])22([0-9]{5})   4500 /\1\2\3  \422\5   4500/g' auth_header.sql
Edited by Andreas Roussos

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