#5554 Special charaters are not shown in the PDF

[nilanga Nayanajith]

Version : orangehrmPDFExportPlugin - Revision 11676

Description : If the Leave request comments, or employee name or leave type name contains special characters or Unicode, those records are not shown in the PDF

here are the used special characters `~!@#$%^&*()_+-={}|[]\:";'<>?,./ or தமிழ்