jsonviewer: fixed string formatting argument

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45014 4005530d-fff6-0310-9dd1-cebe43e6787f
Translations: Hungarian translation update by Péter Gábor, bug 26144

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45015 4005530d-fff6-0310-9dd1-cebe43e6787f