Fix CI workflow using regular debian bookworm

Change-Id: Ic87fbc67ed1453a4f6e08169ab51022cfad585fb
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2fb723a..3175cb5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 default:
-  image: python:3.12-slim-bookworm
+  image: python:3.12-bookworm
 
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
@@ -18,7 +18,7 @@
   - pip install -r requirements.txt
   - python -m spacy download de_core_news_lg
   - apt update -y
-  - apt-get install cpanminus -y
+  - apt-get install -y cpanminus git
   - cpanm https://github.com/KorAP/KorAP-XML-CoNLL-U.git
 
 test-job: