Graphviz install with apt-get

.gitlab-ci.yml

@@ -82,6 +82,7 @@ pages:
   - apt update
   - apt-get -y install graphviz
   - pip install -U sphinx m2r2 furo pyUML pydot==2.0.0 gprof2dot
+  - pip install graphviz
   #- pip install graphviz==2.50.0
   - pip install -e .
   - mkdir public