[gnome-boxes] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit d1706a1b2ba040d33786df2994c7770d2c8a6b4d
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Dec 4 18:40:06 2019 +0100

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index e884a6a3..c24eeb8e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -16,6 +16,7 @@ data/ui/collection-filter-switcher.ui
 data/ui/collection-toolbar.ui
 data/ui/display-page.ui
 data/ui/display-toolbar.ui
+data/ui/downloads-hub-row.ui
 data/ui/empty-boxes.ui
 data/ui/kbd-shortcuts-window.ui
 data/ui/menus.ui