Improve dependencies table in readme

Author: tchapi

README.md

@@ -6,7 +6,7 @@ Davis
 [![Latest release][release_badge]][release_link]
 [![Sponsor me][sponsor_badge]][sponsor_link]
 
-A simple, fully translatable admin interface and frontend for `sabre/dav` based on [Symfony 7](https://symfony.com/) and [Bootstrap 5](https://getbootstrap.com/), initially inspired by [Baïkal](https://github.com/sabre-io/Baikal).
+A simple, fully translatable admin interface and frontend for `sabre/dav` based on [Symfony 7](https://symfony.com/) and [Bootstrap 5](https://getbootstrap.com/), initially inspired by [Baïkal](https://github.com/sabre-io/Baikal) (_see dependencies table below for more detail_)
 
 Provides user edition, calendar creation and sharing, and address book creation. The interface is simple and straightforward, responsive, and provides a light and a dark mode.
 
@@ -39,8 +39,9 @@ Dependencies
 | Release            | Status                     | PHP version        |
 |--------------------|----------------------------|--------------------|
 | `main` (edge)      | development branch         | PHP 8.2+           |
+| `v5.x`             | stable                     | PHP 8.2+           |
 | `v4.x`             | security fixes only        | PHP 8.0 → 8.3      |
-| `v3.x`             | security fixes only        | PHP 7.3 → 8.2      |
+| `v3.x`             | :warning: unmaintained     | PHP 7.3 → 8.2      |
 
 # 🧰 Installation