fix(CI): build ford with Markdown 3.3.4

Author: rouson

.github/workflows/deploy-docs.yml

@@ -15,7 +15,7 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt install -y python3-dev python3 build-essential graphviz
-        sudo pip install ford
+        sudo pip install ford markdown==3.3.4
 
     - name: Build Developer Documenation
       run: |