[gnome-characters] Add "symbols" as a search keyword

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 99677b3d21cf54ba7dc277d53d2cd3839654d6c9
Author: Germán Franco <dev germanfr gmail com>
Date:   Thu Mar 18 20:20:26 2021 +0100

    Add "symbols" as a search keyword
    
    This allows users to find Characters using this new term from their desktop
    environments search engine.

 data/org.gnome.Characters.desktop.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.Characters.desktop.in b/data/org.gnome.Characters.desktop.in
index 6d00924..3ea52ca 100644
--- a/data/org.gnome.Characters.desktop.in
+++ b/data/org.gnome.Characters.desktop.in
@@ -9,4 +9,4 @@ DBusActivatable=true
 StartupNotify=true
 Categories=GNOME;GTK;Utility;X-GNOME-Utilities;
 # Translators: Search terms to find this application. Do NOT translate or localize the semicolons! The list 
MUST also end with a semicolon!
-Keywords=characters;unicode;punctuation;math;letters;emoji;emoticon;
+Keywords=characters;unicode;punctuation;math;letters;emoji;emoticon;symbols;