add libffi-dev lib

.github/workflows/docs-github-pages-cli.yml

@@ -21,7 +21,11 @@ jobs:
         uses: matthiaszepper/sphinx-action-v4@latest
         with:
           container: latest
-          pre-build-command: "apt-get update && apt-get -y install build-essential && pip install --upgrade pip setuptools wheel  && pip install ."
+          pre-build-command: |
+            apt-get update && \
+            apt-get install -y build-essential libffi-dev python3-dev && \
+            pip install --upgrade pip && \
+            pip install -r docs/requirements.txt
           build-command: "make dirhtml"
           docs-folder: "docs/"
       - name: Deploy