[gnome-software/wip/mcrha/static-analyzers-fixes] Try to go back by one version of the CI Fedora image

[Milan Crha <mcrha src gnome org>]

commit c3e582430fb706953fda84bbe93f19dc02462e14
Author: Milan Crha <mcrha redhat com>
Date:   Tue Oct 19 08:07:31 2021 +0200

    Try to go back by one version of the CI Fedora image
    
    Whether the flatpak test will be quicker.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7c747976c..d0356d831 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,7 +20,7 @@ variables:
 
 fedora-x86_64:
   extends: .build
-  image: registry.gitlab.gnome.org/gnome/gnome-software/fedora:v7
+  image: registry.gitlab.gnome.org/gnome/gnome-software/fedora:v6
   stage: build
   except:
     - tags