Font copyright notices from the retained authoring files

chivo-600.ttf
Copyright 2019 The Chivo Project Authors (https://github.com/Omnibus-Type/Chivo)

source-sans-3-var.ttf
© 2023 Adobe (http://www.adobe.com/), with Reserved Font Name ‘Source’

Both font families use SIL Open Font License 1.1. Keep the separate full license notices with any bundled font binaries. The Source Sans 3 upstream notice has an older copyright range; the actual retained font embeds the 2023 notice above. Font names and binaries remain unchanged.