fix: default piece label template

[DSCaskey]

This fixes issue #1087

A simple change in method name fixes the issue by retrieving the default piece label template instead of the default pattern label template.

closes issue #1087

[what-the-diff[bot]]

PR Summary

• Simplified Procedure to Find Files 📂 Previously, we were using an approach called getDefaultPatternTemplate() to determine the name of the files we're working with. But we've found a more straightforward method! Now, we're employing a different function named getDefaultPieceTemplate(). This change should simplify things and make it easier for us to track and handle our files accurately and efficiently. Great progress! 🚀