[mutter] build: Change upcoming version to 40.alpha2

[Florian Müllner <fmuellner src gnome org>]

commit 1fa7176d98f89f35038c85a2e542ad4d73673982
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Dec 22 01:16:20 2020 +0100

    build: Change upcoming version to 40.alpha2
    
    I messed up and released 40.alpha at the same time as 3.38.2, when it's
    supposed to be in January. In order to re-align with the schedule, change
    the upcoming version to 40.alpha2 so we don't have to skip a release and
    will be back on track in time of 40.beta.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index c9d50514e7..17c4368193 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('mutter', 'c',
-  version: '40.beta',
+  version: '40.alpha2',
   meson_version: '>= 0.51.0',
   license: 'GPLv2+'
 )