[release-notes] Add welcome tour

[Matthias Clasen <matthiasc src gnome org>]

commit 8c3d679a001b4952e3f20916436ee3b45b1e46be
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Sep 2 17:20:42 2020 -0400

    Add welcome tour

 help/C/index.page | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index 3f1f3c4c..1f219856 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -44,12 +44,22 @@
     <p></p>
   </section>
 
+  <section>
+    <title>New “Welcome” tour</title>
+    <p>GNOME 3.38 comes with a brand-new “Welcome” tour, which gets shown on first
+    run, after the initial setup. The tour is primarily there to provide onboarding
+    for new users, but it also serves to give a nice welcome to users in their first
+    session.</p>
+    <p>XXX Welcome tour screenshot</p>
+    <p>The Welcome tour is an example of a GNOME application that is written in Rust.</p>
+  </section>
+
   <section>
     <title>Utilities</title>
     <p>Several utilities have been redesigned to provide a more polished and
     elegant experience. This includes Screenshot and Sound Recorder.
     <media type="image" src="figures/screenshot.png"/>
-    XXX Sound recorder screenshot
+    <p>XXX Sound recorder screenshot</p>
     </p>
   </section>