[gtk+/portal] Add gtk_show_uri_on_window to the docs

[Matthias Clasen <matthiasc src gnome org>]

commit c3bd85264e15f298b11f7bb0ef76e7ee344f4cd5
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jul 6 23:26:21 2016 -0400

    Add gtk_show_uri_on_window to the docs

 docs/reference/gtk/gtk3-sections.txt |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/gtk3-sections.txt b/docs/reference/gtk/gtk3-sections.txt
index 38fec8c..0d02cd4 100644
--- a/docs/reference/gtk/gtk3-sections.txt
+++ b/docs/reference/gtk/gtk3-sections.txt
@@ -7526,6 +7526,7 @@ gtk_mount_operation_get_parent
 gtk_mount_operation_set_screen
 gtk_mount_operation_get_screen
 gtk_show_uri
+gtk_show_uri_on_parent
 <SUBSECTION Standard>
 GTK_IS_MOUNT_OPERATION
 GTK_IS_MOUNT_OPERATION_CLASS