[release-notes/gnome-3-36] Add placeholder images

[Link Dupont <link src gnome org>]

commit 1bd8ef5fef3466033d3bb99ef1d6b99a988b344b
Author: Link Dupont <link sub-pop net>
Date:   Sun Mar 1 21:22:47 2020 -0500

    Add placeholder images

 help/C/index.page | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index 72ed463e..089aeb60 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -50,12 +50,14 @@
 
   <section id="do-not-disturb">
     <title>Do Not Disturb</title>
+    <media type="image" width="940" src="figures/placeholder.png"/>
     <p>A Do Not Disturb button was added to the notifications popover.
     When enabled, notifications are hidden until the button is toggled off.</p>
   </section>
 
   <section id="lock-screen">
     <title>Lock Screen</title>
+    <media type="image" width="940" src="figures/placeholder.png"/>
     <p>A lot of design went into improving the login and unlock experience in
     GNOME this release. The resulting lock screen is more functional, easier to
     use, and looks elegant in its simplicity.</p>
@@ -96,7 +98,6 @@
 
   <section id="software">
     <title>Software</title>
-    <media type="image" width="940" src="figures/placeholder.png"/>
     <p>Software now automatically detects metered networks such as mobile data 
     networks. When a metered network is detected, Software pauses updates in
     order to reduce data usage.</p>