CI: Use Debian 12 as default container

I don't think we use this for anything any more, because all build
targets run in some more specific container; but just in case it's
used, we should select the current stable release of Debian and not a
previous, EOL version.

Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 431c78b5fbd96b930a50e177e1f0d39e730aadae)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 45b8407b34e4c11c1fd88937d06bfe23ac451eb5..0f24c143d0a4fe1e6e696b6a426a6099a49df1a4 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -34,7 +34,7 @@ include:
       - '/templates/freebsd.yml'
       - '/templates/opensuse.yml'
 
-image: debian:bullseye-slim
+image: debian:bookworm-slim
 
 stages:
   - 'build docker'