Fix Optional Pixel Sizes for CZI to OME Metadata Conversion

A very small patch to fix CZI to OME converted metadata for the physical pixel sizes attribute. As such this change only affects usage of the ome_metadata property for CZIReader.

What's Changed

• admin/update-czi-to-ome-xslt-submodule by @JacksonMaxfield in #382

Full Changelog: v4.6.1...v4.6.2