[gnome-control-center] display: Fix typo in a11y attribute

[Robert Ancell <rancell src gnome org>]

commit 0118598763dd6055b22b0a6c5e5166a74b5d435a
Author: Robert Ancell <robert ancell canonical com>
Date:   Wed May 11 12:07:31 2022 +1200

    display: Fix typo in a11y attribute

 panels/display/cc-night-light-page.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/panels/display/cc-night-light-page.ui b/panels/display/cc-night-light-page.ui
index 5392cbeee..7f24f54e6 100644
--- a/panels/display/cc-night-light-page.ui
+++ b/panels/display/cc-night-light-page.ui
@@ -105,7 +105,7 @@
                           <item translatable="yes" id="manual">Manual Schedule</item>
                         </items>
                         <accessibility>
-                          <relation name="labeled-by">schedule_row</relation>
+                          <relation name="labelled-by">schedule_row</relation>
                         </accessibility>
                       </object>
                     </child>