[gdm] meson: Bump to 40

[Ray Strode <halfline src gnome org>]

commit 0b28fa2255402a4bb77edd5176da2af26706a1e4
Author: Ray Strode <rstrode redhat com>
Date:   Tue Mar 30 09:21:51 2021 -0400

    meson: Bump to 40

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 376a76cd1..cd1101219 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('gdm', 'c',
-  version: '40.rc',
+  version: '40',
   license: 'GPL2+',
   meson_version: '>= 0.50',
 )