[gnome-clocks] headerbar: mark missing string for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 4cc78bec30c9554aa7382c225ccdb409bac28dcf
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Dec 8 12:04:16 2019 +0100

    headerbar: mark missing string for translation

 data/ui/headerbar.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/ui/headerbar.ui b/data/ui/headerbar.ui
index e7d5dba..8e07ef9 100644
--- a/data/ui/headerbar.ui
+++ b/data/ui/headerbar.ui
@@ -21,7 +21,7 @@
   <template class="ClocksHeaderBar" parent="HdyHeaderBar">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
-    <property name="title">Clocks</property>
+    <property name="title" translatable="yes">Clocks</property>
     <property name="centering_policy">strict</property>
     <property name="show_close_button">True</property>
     <signal name="notify::subtitle" handler="subtitle_changed" swapped="no"/>