doxygen again

.github/workflows/idefix-ci-doc.yml

@@ -5,7 +5,6 @@ on:
     branches:
       - master
       - develop
-      - docCI
   pull_request:
     paths-ignore:
       - '.github/ISSUE_TEMPLATE/*'
@@ -21,6 +20,7 @@ jobs:
           submodules: recursive
       - name: install dependencies
         run: sudo apt-get install -y doxygen
+      - name: install doxygen
         run: python -m pip install --exists-action=w --no-cache-dir -r doc/python_requirements.txt
       - name: compile documentation
         run: python -m sphinx -T -b html -d _build/doctrees -D language=en doc/source doc/html