Changeset 59709 for trunk/src/wp-admin/css/forms.css

Administration: Use a lighter font-weight value for settings labels.

This changeset lowers the font-weight value from 600 to 400 for labels located in the Settings screens.
This is an initial implementation of the WordPress design system, aligning with the broader goal of achieving a more consistent and unified design across the administration.

Props karmatosed, audrasjb.
Fixes #62865.