[gtk/ebassi/issue-3905] docs: Add missing extra files for gdk4 sub-references

[Emmanuele Bassi <ebassi src gnome org>]

commit 29382360edfaeeedb60b1a31d3f560ba0673db68
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Apr 28 01:44:47 2021 +0100

    docs: Add missing extra files for gdk4 sub-references
    
    The Wayland and X11 references need the gtk-logo.svg and the urlmap.js
    extra files.
    
    Fixes: #3905

 docs/reference/gdk/gdk4-wayland.toml.in | 6 ++++++
 docs/reference/gdk/gdk4-x11.toml.in     | 6 ++++++
 2 files changed, 12 insertions(+)
---
diff --git a/docs/reference/gdk/gdk4-wayland.toml.in b/docs/reference/gdk/gdk4-wayland.toml.in
index ba47b9dc11..96ca18f64e 100644
--- a/docs/reference/gdk/gdk4-wayland.toml.in
+++ b/docs/reference/gdk/gdk4-wayland.toml.in
@@ -21,3 +21,9 @@ show_index_summary = true
 
 [source-location]
 base_url = "https://gitlab.gnome.org/GNOME/gtk/-/blob/master/";
+
+[extra]
+content_images = [
+  "images/gtk-logo.svg",
+]
+urlmap_file = "urlmap.js"
diff --git a/docs/reference/gdk/gdk4-x11.toml.in b/docs/reference/gdk/gdk4-x11.toml.in
index ba47b9dc11..96ca18f64e 100644
--- a/docs/reference/gdk/gdk4-x11.toml.in
+++ b/docs/reference/gdk/gdk4-x11.toml.in
@@ -21,3 +21,9 @@ show_index_summary = true
 
 [source-location]
 base_url = "https://gitlab.gnome.org/GNOME/gtk/-/blob/master/";
+
+[extra]
+content_images = [
+  "images/gtk-logo.svg",
+]
+urlmap_file = "urlmap.js"