[rhythmbox] help: Mention Soundcloud listed in sidebar

[Andre Klapper <aklapper src gnome org>]

commit a8590c624da6521ad3459120e78595ddd5fd253d
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Jan 1 23:02:07 2020 +0100

    help: Mention Soundcloud listed in sidebar

 help/C/index.docbook | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/help/C/index.docbook b/help/C/index.docbook
index b7e2a7297..8ff9422b9 100644
--- a/help/C/index.docbook
+++ b/help/C/index.docbook
@@ -389,6 +389,8 @@
                                  </para></listitem>
                                  <listitem><para>Music stores like Jamendo and Magnatune.
                                  </para></listitem>
+                                 <listitem><para>Music sharing websites like SoundCloud.
+                                 </para></listitem>
                                </itemizedlist>
                </para>
        <para>It can also contain the play queue if <guimenuitem>Play Queue in Side