Point to gnome installation page instead of ours

Author: GuillaumeGomez

docs-src/index.md

@@ -3,7 +3,9 @@ layout: default
 ---
 # Gtk-rs documentation
 
-## [Requirements](requirements.html)
+## Requirements
+
+First, prepare your system by taking a look at the [GNOME installation page](https://www.gtk.org/docs/installations/).
 
 ## Crate API docs
 

docs-src/requirements.md

@@ -50,7 +50,7 @@ layout: wide
 
 ## Using
 
-First, prepare your system by taking a look at the [requirements](http://gtk-rs.org/docs-src/requirements.html).
+First, prepare your system by taking a look at the [GNOME installation page](https://www.gtk.org/docs/installations/).
 
 Then include `gtk` and `gio` in your `Cargo.toml` and set the minimal GTK version required by your project:
 {% assign gtk = site.data.crates | where: "name", "gtk" %}