[gtk-web/gtk4-prep: 1/3] Update api doc links

[Matthias Clasen <matthiasc src gnome org>]

commit 14f30e4b271f033c24eb836d239f1cc9115e353b
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 5 21:58:26 2020 -0400

    Update api doc links
    
    Point to GTK4, GDK4, and GSK4 docs. These links need
    to be changed from unstable to stable when GTK4 is
    released.

 _data/navigation.yml | 16 ++++++++--------
 _docs/apis/index.md  |  5 +++--
 2 files changed, 11 insertions(+), 10 deletions(-)
---
diff --git a/_data/navigation.yml b/_data/navigation.yml
index c9133397..8ac76084 100644
--- a/_data/navigation.yml
+++ b/_data/navigation.yml
@@ -171,13 +171,17 @@ sidebar_sections:
 #   href: url on the external link
 
 sidebar_external_links:
-  - title: GTK3
+  - title: GTK
     section: apis
-    href: https://developer.gnome.org/gtk3/stable/
+    href: https://developer.gnome.org/gtk4/unstable/
 
-  - title: GTK4
+  - title: GDK
+    section: apis
+    href: https://developer.gnome.org/gdk4/unstable/
+
+  - title: GSK
     section: apis
-    href: https://gnome.pages.gitlab.gnome.org/gtk/gtk/
+    href: https://developer.gnome.org/gsk4/unstable/
 
   - title: GLib, GObject, GIO
     section: architecture
@@ -190,10 +194,6 @@ sidebar_external_links:
   - title: Pango
     section: architecture
     href: https://developer.gnome.org/pango/stable/
-  
-  - title: GDK
-    section: architecture
-    href: https://developer.gnome.org/gdk3/stable/
 
   - title: Cairo
     section: architecture
diff --git a/_docs/apis/index.md b/_docs/apis/index.md
index d35acf73..eda21834 100644
--- a/_docs/apis/index.md
+++ b/_docs/apis/index.md
@@ -6,8 +6,9 @@ application development.
 
 ### User interface and display
 
- - [GTK](https://developer.gnome.org/gtk/stable/) — Widget toolkit for graphical interfaces
- - [GDK](https://developer.gnome.org/gdk/stable/) — Low-level abstraction for the windowing system
+ - [GTK](https://developer.gnome.org/gtk/unstable/) — Widget toolkit for graphical interfaces
+ - [GDK](https://developer.gnome.org/gdk/unstable/) — Low-level abstraction for the windowing system
+ - [GSK](https://developer.gnome.org/gsk/unstable/) — Low-level scene graph and 3D rendering API
  - [Cairo](https://developer.gnome.org/cairo/stable/) — 2D, vector-based drawing for high-quality graphics
  - [Pango](https://developer.gnome.org/pango/stable/) — International text rendering with full Unicode 
support
  - [ATK](https://developer.gnome.org/atk/stable/) — Accessibility toolkit to implement support for screen 
readers and other tools