[babl] ci: attempt building with latest archlinux image

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 6c9ee1ca756a37533e94593ae09be28cc7bdec7a
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Feb 23 17:24:13 2022 +0100

    ci: attempt building with latest archlinux image

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 69a2bec8a..3bb72ab9f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,7 +4,7 @@ cache:
 
 .build:
   stage: build
-  image: archlinux:base-20210214.0.15477
+  image: archlinux:latest
   variables:
     PACMAN_CACHE: $CI_PROJECT_DIR/_pacman_cache
   artifacts: