[gtk: 1/2] fix typo in GtkDragSource doc

[Timm Bäder <baedert src gnome org>]

commit 266fceddf0778dfb4fe2272ee3b08ca7fa47c726
Author: Alexandros Theodotou <alex zrythm org>
Date:   Mon Nov 1 03:48:52 2021 +0000

    fix typo in GtkDragSource doc
    
    GtkDrag => GdkDrag

 gtk/gtkdragsource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkdragsource.c b/gtk/gtkdragsource.c
index b3df700065..e654729405 100644
--- a/gtk/gtkdragsource.c
+++ b/gtk/gtkdragsource.c
@@ -103,7 +103,7 @@
  * ```c
  * static void
  * on_drag_begin (GtkDragSource *source,
- *                GtkDrag       *drag,
+ *                GdkDrag       *drag,
  *                MyWidget      *self)
  * {
  *   // Set the widget as the drag icon