break system packages for flask install via pip

.gitlab-ci.yml

@@ -9,7 +9,7 @@ build job:
     - apt-get update -qy
     - apt-get install -y python3-dev python3-pip python3.12-venv
     - python3 -V
-    - pip3 install -r requirements.txt
+    - pip3 install --break-system-packages -r requirements.txt
 
     # launch tests
     - export PYTHONPATH=.