[mutter] ci: Add asciidoc to image

[Marge Bot <marge-bot src gnome org>]

commit f41b165f9c62c82ec6aab02d49082c2db5b2ea2e
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 31 17:18:31 2021 +0200

    ci: Add asciidoc to image
    
    gnome-shell uses it to pre-generate man pages at dist time.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1980>

 .gitlab-ci.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bf1cb57c42..4e361c31a7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,8 +16,9 @@ variables:
 .mutter.fedora:34@common:
   variables:
     FDO_DISTRIBUTION_VERSION: 34
-    BASE_TAG: '2021-09-04.0'
+    BASE_TAG: '2021-09-04.1'
     FDO_DISTRIBUTION_PACKAGES:
+      asciidoc
       clang
       gcovr
       gdm