[gnome-dictionary] build: Fix a copy-paste mistake

[Piotr Drąg <piotrdrag src gnome org>]

commit 09b3301d2ad45dc72023888f37dd444a37f0ee92
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Sep 29 01:21:46 2018 +0200

    build: Fix a copy-paste mistake

 data/meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/meson.build b/data/meson.build
index 0c6ff7a..c2ba977 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -14,7 +14,7 @@ if desktop_file_validate.found()
        workdir: meson.current_build_dir())
 endif
 
-i18n.merge_file ('desktop',
+i18n.merge_file ('appdata',
                  input: 'org.gnome.Dictionary.appdata.xml.in',
                  output: 'org.gnome.Dictionary.appdata.xml',
                  install: true,
@@ -48,7 +48,7 @@ sources = [
 ]
 
 foreach s: sources
-  i18n.merge_file('desktop',
+  i18n.merge_file('sources',
                   input: '@0@.in'.format(s),
                   output: s,
                   install: true,