[release-notes] Update the introduction

[Matthias Clasen <matthiasc src gnome org>]

commit 41c1faedac4bd09375199bcc7aac2631a95234b4
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Sep 2 15:50:37 2020 -0400

    Update the introduction
    
    Mention Orbis and Zacatecas.

 help/C/index.page | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index 97f6e912..41140004 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -32,7 +32,11 @@
   release incorporates &gitcommits; changes, made by approximately &gitauthors;
   contributors.</p>
   
-  <p></p>
+  <p>3.38 has been named “Orbis” in recognition of the team behind GUADEC 2020.
+  GUADEC is GNOME’s annual conference, which is only possible thanks to the hard
+  work of many volunteers. This years event was meant to be held in Zacatecas,
+  Mexico, but had to be moved online due to the pandemic. We are very much
+  looking forward to meeting in Mexico in the near future.</p>
 
   <section id="">
     <title></title>