[gnome-shell/wip/carlosg/bump-wayland-protocols] ci: synchronize image from the mutter repo

[Carlos Garnacho <carlosg src gnome org>]

commit 07b2020c35320c38dbae2227e4a8cffa1e6edef8
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Dec 4 17:13:31 2021 +0100

    ci: synchronize image from the mutter repo
    
    We've started requiring wayland-protocols, so need to update to
    a matching image.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5ec1fbe2c2..b40419662a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,7 +31,7 @@ variables:
   LINT_LOG: "eslint-report.xml"
   LINT_MR_LOG: "eslint-mr-report.xml"
 
-image: registry.gitlab.gnome.org/gnome/mutter/fedora/34:x86_64-2021-09-04.1
+image: registry.gitlab.gnome.org/gnome/mutter/fedora/34:x86_64-2021-09-15.0
 
 workflow:
   rules: