[totem/mallard-documentation] Update name of section in Preferences

[Andre Klapper <aklapper src gnome org>]

commit 097eebcd74e84392dae13eac4c60abc5653761c3
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Jan 11 18:01:55 2019 +0100

    Update name of section in Preferences

 help/C/subtitles.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/subtitles.page b/help/C/subtitles.page
index a3b16cb7..5efb5f42 100644
--- a/help/C/subtitles.page
+++ b/help/C/subtitles.page
@@ -38,7 +38,7 @@
 
   <note style="tip">
     <p>Adjust size and font of subtitles to your needs. See
-    <guiseq><gui>General</gui><gui>Text Subtitles</gui></guiseq>
+    <guiseq><gui>General</gui><gui>External Subtitles</gui></guiseq>
     section on <link xref="preferences"/> page.</p>
   </note>