[gtk] stack: Fix :needs-attention docs

[Timm Bäder <baedert src gnome org>]

commit e45518fb5f3b80c8a0c3c048fbc418817910402c
Author: Timm Bäder <mail baedert org>
Date:   Sat Jun 13 21:25:21 2020 +0200

    stack: Fix :needs-attention docs
    
    This is a property on GtkStackPage these days.

 gtk/gtkstack.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index b0715960d6..a46e897ca0 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -403,9 +403,9 @@ gtk_stack_page_class_init (GtkStackPageClass *class)
                          GTK_PARAM_READWRITE);
 
   /**
-   * GtkStack:needs-attention:
+   * GtkStackPage:needs-attention:
    *
-   * Sets a flag specifying whether the child requires the user attention.
+   * Sets a flag specifying whether the oage requires the user attention.
    * This is used by the #GtkStackSwitcher to change the appearance of the
    * corresponding button when a page needs attention and it is not the
    * current one.