[gimp/barthalion/gnome-runtime-images-quay] Update (or drop) the Docker image used by Flatpak job

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 690316a1b50fee020567bc56360d292e78a09bd6
Author: Bartłomiej Piotrowski <b bpiotrowski pl>
Date:   Wed Jul 27 12:40:45 2022 +0200

    Update (or drop) the Docker image used by Flatpak job
    
    The gnome-runtime-images have been recently migrated to Quay. This is already reflected in the template.
    
    Please note this MR has been created semi-automatically. If it doesn't make sense, feel free to close it.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e493e4f971..4c3ec40f3c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -614,7 +614,7 @@ gimp-win32:
 ## To learn more about the CI, go to https://gitlab.gnome.org/GNOME/Initiatives/-/wikis/DevOps-with-Flatpak
 
 flatpak:
-  image: 'registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master'
+  image: 'quay.io/gnome_infrastructure/gnome-runtime-images:gnome-master'
   stage: gimp
   tags:
     - flatpak