[gtk/filename-sorter] stringsorter: Fix up a doc typo

[Matthias Clasen <matthiasc src gnome org>]

commit c419b57754994b0e972a87b7b6549f1770171a8a
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 11 15:32:05 2022 -0400

    stringsorter: Fix up a doc typo
    
    gi-docgen links can be tricky to get right.

 gtk/gtkstringsorter.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkstringsorter.h b/gtk/gtkstringsorter.h
index 7e687e51d1..2d0924fd2a 100644
--- a/gtk/gtkstringsorter.h
+++ b/gtk/gtkstringsorter.h
@@ -50,8 +50,8 @@ void                    gtk_string_sorter_set_ignore_case       (GtkStringSorter
 /**
  * GtkCollation:
  * @GTK_COLLATION_NONE: Don't do any collation
- * @GTK_COLLATION_UNICODE: Use [func@GLib.g_utf8_collate_key]
- * @GTK_COLLATION_FILENAME: Use [func@GLib.g_utf8_collate_key_for_filename]
+ * @GTK_COLLATION_UNICODE: Use [func@GLib.utf8_collate_key]
+ * @GTK_COLLATION_FILENAME: Use [func@GLib.utf8_collate_key_for_filename]
  *
  * Describes how a [class@Gtk.StringSorter] turns strings into sort keys to
  * compare them.