[totem/mallard-documentation] Don't abuse <code> for non-code text

[Andre Klapper <aklapper src gnome org>]

commit 88e3ac0cd3a055d6484a0a8c468d808d82ad2ac5
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Jan 11 23:13:10 2019 +0100

    Don't abuse <code> for non-code text

 help/C/properties.page | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/help/C/properties.page b/help/C/properties.page
index a47d4d79..4c517d67 100644
--- a/help/C/properties.page
+++ b/help/C/properties.page
@@ -32,17 +32,17 @@
 
   <terms>
     <item>
-      <title><code>General</code></title>
-      <p>You may find here information about the title, artist, album, year,
+      <title><gui>General</gui></title>
+      <p>Information about the title, artist, album, year,
       duration, comment and container.</p>
     </item>
     <item>
-      <title><code>Video</code></title>
-      <p>Information about dimensions, codec, framerate and bitrate.</p>
+      <title><gui>Video</gui></title>
+      <p>Information about the dimensions, codec, framerate and bitrate.</p>
     </item>
     <item>
-      <title><code>Audio</code></title>
-      <p>You may get to know about codec, channels, sample rate and bitrate.</p>
+      <title><gui>Audio</gui></title>
+      <p>Information about the codec, channels, sample rate and bitrate.</p>
     </item>
   </terms>