[release-notes/gnome-40: 1917/1919] Add placeholders for missing content

[Link Dupont <link src gnome org>]

commit 43ed99fd429c2df23d50e915ed1e28d966daf262
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Mar 22 10:54:24 2021 -0400

    Add placeholders for missing content

 help/C/developers.page | 3 ++-
 help/C/index.page      | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index b4988792..b2547241 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -56,7 +56,8 @@
     <title>Other Improvements</title>
     <p>Other improvements in GNOME &gnomeversion; include:</p>
     <list>
-      <item><p>Name a thing here</p></item>
+      <item><p><app>Sysprof</app> has learned to decode stack traces from containers</p></item>
+      <item><p>List some gnome-builder things here</p></item>
     </list>
   </section>
 
diff --git a/help/C/index.page b/help/C/index.page
index 195dd246..d2343b58 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -41,6 +41,8 @@
 
   <section id="shell-overview">
     <title>New Shell Overview</title>
+    <media type="image" src="figures/shell-overview.png">Shell Overview</media>
+    <media type="image" src="figures/shell-overview2.png">Shell Overview</media>
     <p>The GNOME Shell Overview overview has been rearranged. Workspaces are now
     horizontal and the dash is along the bottom screen edge. Workspaces appear as
     a large filmstrip along the center of the screen.</p>
@@ -67,6 +69,7 @@
     to Keyboard, where they are easier to find.</p>
     <p>It is now possible to configure the Compose key and the the 3rd level
     chooser key.</p>
+    <media type="image" src="figures/input-settings.png">Input settings</media>
   </section>
 
   <section id="input-improvements">
@@ -90,30 +93,35 @@
     <p>The `carousel` has been improved to look better. It now cycles automatically,
     and also supports swipes.</p>
     <p>The version history dialogs on the detail page have been rewritten.</p>
+    <media type="image" src="figures/software.png">Software</media>
   </section>
 
   <section id="weather">
     <title>Improvements in Weather</title>
     <p>The <app>Weather</app> application has been completely redesigned and shows
     more information now.</p>
+    <media type="image" src="figures/weather.png">Weather</media>
   </section>
 
   <section id="maps">
     <title>Improvements in Maps</title>
     <p>The <app>Maps</app> application now provides information about places in
     information cards.</p>
+    <media type="image" src="figures/maps.png">Maps Information</media>
   </section>
 
   <section id="web">
     <title>Improvements in Web</title>
     <p>The <app>Web</app> application has a new tabs implementation, which is
     prettier and more powerful.</p>
+    <media type="image" src="figures/web.png">Web Tabs</media>
   </section>
 
   <section id="files">
     <title>Improvements in Files</title>
     <p>The <app>Files</app> application has a new preference dialog that better
     matches the style of other application.</p>
+    <media type="image" src="figures/filies.png">Files Preferences</media>
   </section>
 
   <section id="more">