[gnome-user-docs/wip/mdh] gnome-help: note mouse wheel volume (fixes #141)

[Michael Hill <mdhill src gnome org>]

commit 3a755e50b17cb23d1c1b340f0cfee8b004a93f9f
Author: Michael Hill <mdhillca gmail com>
Date:   Wed Mar 2 18:02:52 2022 -0500

    gnome-help: note mouse wheel volume (fixes #141)

 gnome-help/C/sound-broken.page |  2 +-
 gnome-help/C/sound-volume.page | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/gnome-help/C/sound-broken.page b/gnome-help/C/sound-broken.page
index 60f971de..94045b68 100644
--- a/gnome-help/C/sound-broken.page
+++ b/gnome-help/C/sound-broken.page
@@ -3,7 +3,7 @@
       id="sound-broken">
 
   <info>
-    <link type="guide" xref="media#sound" group="#first"/>
+    <link type="guide" xref="media#sound"/>
     <link type="guide" xref="hardware#problems"/>
 
     <revision pkgversion="3.4.0" date="2012-02-19" status="outdated"/>
diff --git a/gnome-help/C/sound-volume.page b/gnome-help/C/sound-volume.page
index a469c67e..82a98215 100644
--- a/gnome-help/C/sound-volume.page
+++ b/gnome-help/C/sound-volume.page
@@ -3,10 +3,10 @@
       id="sound-volume">
 
   <info>
-    <link type="guide" xref="media#sound"/>
+    <link type="guide" xref="media#sound" group="#first"/>
 
     <revision version="gnome:40" date="2021-02-26" status="candidate"/>
-    <revision version="gnome:42" status="final" date="2022-02-26"/>
+    <revision version="gnome:42" status="final" date="2022-03-02"/>
 
     <credit type="author">
       <name>Phil Bull</name>
@@ -33,6 +33,12 @@
   <gui xref="shell-introduction#systemmenu">system menu</gui> from the right
   side of the top bar and move the volume slider left or right. You can
   completely turn off sound by dragging the slider to the left.</p>
+ 
+  <note style="tip">
+    <p>If you hover over the volume icon in the top bar or the slider in the
+    system menu, the volume can be controlled by scrolling the mouse wheel or
+    touchpad.</p>
+  </note>
 
   <p>Some keyboards have keys that let you control the volume. They normally
   look like stylized speakers with waves coming out of them. They are often