[gnome-builder/wip/gtk4-port] plugins/buildui: fix end margin

[Christian Hergert <chergert src gnome org>]

commit 590a9a0fe1ad3d6faa2e47a8eada838c0b313eab
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 27 10:59:50 2022 -0700

    plugins/buildui: fix end margin
    
    Found at https://www.youtube.com/watch?v=OdZrIvsfCRs&lc=UgyKgU2xBZQzrmTrjpN4AaABAg

 src/plugins/buildui/gbp-buildui-pane.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/buildui/gbp-buildui-pane.ui b/src/plugins/buildui/gbp-buildui-pane.ui
index 86a943366..cf44c3399 100644
--- a/src/plugins/buildui/gbp-buildui-pane.ui
+++ b/src/plugins/buildui/gbp-buildui-pane.ui
@@ -11,7 +11,7 @@
             <property name="margin-top">6</property>
             <property name="margin-bottom">6</property>
             <property name="margin-start">6</property>
-            <property name="margin-bottom">6</property>
+            <property name="margin-end">6</property>
             <property name="column-spacing">6</property>
             <property name="row-spacing">6</property>
             <property name="hexpand">false</property>