update theme

assets/js/zzzz-search-data.json

docs/configuration.md

docs/customization.md

docs/minimal-test.md

docs/navigation-structure.md

docs/search.md

docs/ui-components/buttons.md

docs/ui-components/callouts 2.md

docs/ui-components/callouts.md

docs/ui-components/code 2.md

docs/ui-components/code.md

docs/ui-components/line-nos.md

docs/ui-components/typography.md

docs/utilities/color.md

docs/utilities/layout.md

docs/utilities/responsive-modifiers.md

docs/utilities/typography.md

docs/utilities/utilities.md

index.md

just-the-docs.gemspec