Bump cable_ready gem and package to 5.0.3

[dacook]

Release notes for v5.0.3:

Replacement for the corrupted 5.0.2 release

• Hopeful that this will help with #11752
• Closes https://github.com/openfoodfoundation/openfoodnetwork/pull/12246 as an alternative

What should we test?

This is the underlying framework used for the dynamic functionality used on the below pages. Simply checking that they work as usual, with no errors in the dev console should be sufficient.

• BUU Bulk Edit Products (/admin/products with admin_style_v3)
• A report, eg /admin/reports/packing/customer (old or new design, doesn't matter)

Dependencies

• Depends on https://github.com/openfoodfoundation/openfoodnetwork/pull/12260