[gtk] ci: Use a different Docker image

[Emmanuele Bassi <ebassi src gnome org>]

commit 44469197d500e6a5812a3b595c7633c708f53a8b
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Mar 13 16:05:03 2018 +0000

    ci: Use a different Docker image
    
    I've rebuilt the new Docker image we use for CI to include GStreamer in
    the dependencies.
    
    We really need to have the Docker registry hosted on gnome.org, to avoid
    pointing people at Dockerhub.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e23a161728..9bae24e751 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: lazka/gitlab-gtk:v1
+image: ebassi/gitlab-gtk:latest
 
 stages:
   - build