ci(gitlab): install git for release job

.gitlab-ci.yml

@@ -39,6 +39,7 @@ release:
   stage: release
   image: docker.io/python:3.8-slim-bullseye
   before_script:
+    - apt-get update && apt-get install git
     - pip install --requirement requirements.ci.txt
   script:
     - semantic-release --verbosity=DEBUG publish