[gtk/ebassi/gidocgen: 98/98] ci: Update the fedora-docs Docker image

[Emmanuele Bassi <ebassi src gnome org>]

commit 53a8b3dcd536ea16529062d74547ffb02184c4d5
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Feb 15 18:02:53 2021 +0000

    ci: Update the fedora-docs Docker image
    
    Use the latest base image.

 .gitlab-ci/fedora-docs.Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci/fedora-docs.Dockerfile b/.gitlab-ci/fedora-docs.Dockerfile
index 403daeadb1..d9c9b44ea2 100644
--- a/.gitlab-ci/fedora-docs.Dockerfile
+++ b/.gitlab-ci/fedora-docs.Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v25
+FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v28
 
 RUN dnf -y install \
         python3-jinja2 \