Update PhotoBook.php
Update PhotoBook.php

I've update the resolution of the photo.
This will work with https://github.com/ChurchCRM/CRM/pull/3196
Cause the in Photo.php one function is not well written.
ChurchCRM/CRM,ChurchCRM/CRM,ChurchCRM/CRM,ChurchCRM/CRM,ChurchCRM/CRM