[releng] Add dconf-editor

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2b47271d8aa6aa155e33081d98986abae8caef2f
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Wed Sep 22 07:43:55 2021 -0500

    Add dconf-editor
    
    Fixes #29

 tools/smoketesting/tarball-conversion.config | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/tools/smoketesting/tarball-conversion.config b/tools/smoketesting/tarball-conversion.config
index f5af25f..52e5f4d 100644
--- a/tools/smoketesting/tarball-conversion.config
+++ b/tools/smoketesting/tarball-conversion.config
@@ -131,6 +131,7 @@
     <package name="baobab"                      set="core"/>
     <package name="cheese"                      set="core"/>
     <package name="devhelp"                     set="core"/>
+    <package name="dconf-editor"                set="core"/>
     <package name="eog"                         set="core"/>
     <package name="epiphany"                    set="core"/>
     <package name="evince"                      set="core"/>