[gtksourceview] subprojects: fix revision for GTK

[Christian Hergert <chergert src gnome org>]

commit 005ee122e01939f5a005ef27222a4f2bd56d9412
Author: Christian Hergert <chergert redhat com>
Date:   Wed Feb 2 13:12:51 2022 -0800

    subprojects: fix revision for GTK
    
    It uses main now instead of master.

 subprojects/gtk.wrap | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/gtk.wrap b/subprojects/gtk.wrap
index 810959df..2a6f74fe 100644
--- a/subprojects/gtk.wrap
+++ b/subprojects/gtk.wrap
@@ -2,7 +2,7 @@
 directory=gtk
 url=https://gitlab.gnome.org/GNOME/gtk.git
 push-url=ssh://git gitlab gnome org:GNOME/gtk.git
-revision=master
+revision=main
 depth=1
 
 [provide]