[mutter] window: Fix up comment

[Marge Bot <marge-bot src gnome org>]

commit 844445b8076a526057b882a6d4b9a1849c2347de
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Nov 30 16:37:01 2021 +0100

    window: Fix up comment
    
    Whoops, someone sneaked in a stray verb ...
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4825
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2123>

 src/core/window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index adb9315b35..3e5cec1aa2 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7973,7 +7973,7 @@ meta_window_get_frame_bounds (MetaWindow *window)
  * meta_window_is_attached_dialog:
  * @window: a #MetaWindow
  *
- * Tests if @window is should be attached to its parent window.
+ * Tests if @window should be attached to its parent window.
  * (If the "attach_modal_dialogs" option is not enabled, this will
  * always return %FALSE.)
  *