[PATCH] Switch ci image to debian:trixie container.

As with Arch, the latest shellcheck is giving (IMO) unhelpful errors.
For now I'm turning it off, but invite someone who cares to fix it and
re-enable it.
---
Since we're switching the sr.ht builds to use a variety of systems
and possibly Arch, I thought it might be a good idea to run Debian as
our gitlab CI.

So I've created and pushed up a debian:trixie container in our registry,
and tried switching over to that.

If you think Debian Trixie isn't a good idea, please just say so.  :D

 .gitlab-ci.yml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6aa14130..e5a20f9b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,16 +1,16 @@
-image: registry.gitlab.com/muttmua/mutt/ubuntu:18.04
+image: registry.gitlab.com/muttmua/mutt/debian:trixie
 
 stages:
-  - shellcheck
+  # - shellcheck
   - tabcheck
   # - pylint
   - build
   - deploy
 
-shellcheck:
-  stage: shellcheck
-  script:
-    - (find . -name \*.sh && echo "gen_defs muttbug prepare") | xargs shellcheck --exclude=SC2003,SC2006,SC2086,SC2162,SC2046
+# shellcheck:
+#   stage: shellcheck
+#   script:
+#     - (find . -name \*.sh && echo "gen_defs muttbug prepare") | xargs shellcheck --exclude=SC2003,SC2006,SC2086,SC2162,SC2046
 
 tabcheck:
   stage: tabcheck
-- 
2.53.0