CI: Remove python 3.8 tests from pipeline

.gitlab-ci.yml

@@ -135,21 +135,15 @@ unittest_py311:
     - python3 -c "import linkahead; print('LinkAhead Version:', linkahead.__version__)"
     - tox
 
-unittest_py38:
+unittest_py39:
   tags: [docker]
   stage: unittest
-  image: python:3.8
+  image: python:3.9
   script: &python_test_script
     - pip install --break-system-packages git+https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git@dev
     - pip install --break-system-packages .[all]
     - pytest --cov=caosadvancedtools unittests
 
-unittest_py39:
-  tags: [docker]
-  stage: unittest
-  image: python:3.9
-  script: *python_test_script
-
 unittest_py310:
   tags: [docker]
   stage: unittest