[gtk/gir-test] ci: Use the v26 of the Fedora image

[Matthias Clasen <matthiasc src gnome org>]

commit b27b58f0d984bdb370487bb9c1476835e40352af
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jan 17 19:47:46 2021 -0500

    ci: Use the v26 of the Fedora image
    
    This inclucs python3-gobject.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1f662c3a7f..7514359ed3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,7 +24,7 @@ variables:
   BACKEND_FLAGS: "-Dx11-backend=true -Dwayland-backend=true -Dbroadway-backend=true"
   FEATURE_FLAGS: "-Dvulkan=enabled -Dcloudproviders=enabled"
   MESON_TEST_TIMEOUT_MULTIPLIER: 3
-  FEDORA_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora:v25"
+  FEDORA_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora:v26"
   FLATPAK_IMAGE: "registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master"
   DOCS_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora-docs:v25"