[Easy] Fix typo in package_exporter.py (#55551)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55551
Simple typo, it should be `OrderedImporter`
Test Plan: ci
Differential Revision: D27629463
fbshipit-source-id: 745527a8339f03a8fd38d0a4491811b3c9ca9b1e
