[gtk/ebassi/ci-publish-doc-fix] ci: Force the fedora image for the publish-docs job

[Emmanuele Bassi <ebassi src gnome org>]

commit 35808a918de5f8e12b5c47b7986cb2382a193b06
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jun 28 21:31:07 2022 +0100

    ci: Force the fedora image for the publish-docs job
    
    Otherwise every CI runner might decide to use a different default
    image, and we'll end up on one that doesn't have curl.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c2a742d86b..cf0311a5f8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -346,6 +346,7 @@ reference:
       - _reference
 
 publish-docs:
+  image: fedora:latest
   stage: publish
   needs: ['reference']
   script: