Progress Timestamp Bug Fix

Just a small update to note that a bug with the timestamps for achievements which have a progress stat has been fixed. You can check out the specific lines that changed in the GitHub: https://github.com/shawna-p/RenPy-Achievements

If you don't use progress stats for your achievements, you don't need to update, and you don't need to update if you're not displaying timestamps in the achievement screen (but it might not hurt to add the change in, in case you do use them later!). Otherwise, you can either grab the new .zip and replace your achievement_backend.rpy with the new code, or just find the 3 lines or so that changed via the GitHub and update those yourself.

Thank you to HB38 for the bug report & fix!