chore(docs): sync readme section

Author: github-actions[bot]

README.md

@@ -223,6 +223,7 @@ If Custom Icons are intended to be used in [React Server Components](#react-serv
 - [IgnaceMaes/ember-phosphor-icons](https://github.com/IgnaceMaes/ember-phosphor-icons) ▲ Phosphor icons for Ember apps
 - [iota-uz/icons](https://github.com/iota-uz/icons) ▲ Phosphor icons as Templ components (Go)
 - [jajuma/phosphorhyva](https://github.com/JaJuMa-GmbH/phosphor-hyva) ▲ Phosphor icons for Magento 2 & Mage-OS with Hyvä Theme
+- [Kitten](https://kitten.small-web.org/reference/#icons) ▲ Phosphor icons integrated by default in Kitten
 - [lucagoslar/phosphor-css](https://github.com/lucagoslar/phosphor-css) ▲ CSS wrapper for Phosphor SVG icons
 - [maful/ruby-phosphor-icons](https://github.com/maful/ruby-phosphor-icons) ▲ Phosphor icons for Ruby and Rails applications
 - [meadowsys/phosphor-svgs](https://github.com/meadowsys/phosphor-svgs) ▲ Phosphor icons as Rust string constants