[release-notes] Fill out settings section

[Link Dupont <link src gnome org>]

commit 64c3c37cf9a4cce8f332c9633784e80a8a645e43
Author: Link Dupont <link sub-pop net>
Date:   Fri Sep 4 12:49:42 2020 -0400

    Fill out settings section

 help/C/index.page | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index e41a40d5..e3c2740e 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -58,7 +58,16 @@
 
   <section id="settings">
     <title>Settings</title>
-    <p>XXX</p>
+    <p><app>Settings</app> can now manage parental controls for <gui>Standard</gui>
+    user accounts through the new <gui>Parental Controls</gui> option in the
+    <gui>Users</gui> section. Installed applications can be filtered from the
+    application overview, preventing them from being launched by the managed
+    user. <gui>Parental Controls</gui> also integrates with exist
+    <app>Software</app> application restrictions, allowing you to select which
+    applications can be installed.</p>
+    <p>Other improvements to <app>Settings</app> include a new fingerprint
+    enrollment interface for devices with fingerprint readers and an option to
+    show battery percentage indicator in the system menu.</p>
   </section>
 
   <section id="screen-recording">