ci(gitlab): remove '--user' from pip command to install to the system's default location

.gitlab-ci.yml

@@ -39,7 +39,7 @@ release:
   stage: release
   image: docker.io/python:3.8-slim-bullseye
   before_script:
-    - pip install --user --requirement requirements.ci.txt
+    - pip install --requirement requirements.ci.txt
   script:
     - semantic-release --verbosity=DEBUG publish
   rules: