add PyMdown extensions

Author: briantoby

.github/workflows/test_builddocsite.yml

@@ -34,7 +34,7 @@ jobs:
         uses: pandoc/actions/setup@v1
       - name: mkdocs setup
         run: |
-          pip install mkdocs mkdocs-material python-markdown-math mkdocs-static-i18n
+          pip install mkdocs mkdocs-material python-markdown-math mkdocs-static-i18n pymdown-extensions
 
       - name: Checkout
         uses: actions/checkout@v4

MDhelp/mkdocs.yml_pdf

@@ -71,6 +71,7 @@ plugins:
 #        - index.md
       render_js: true
       headless_chrome_path: /usr/bin/google-chrome-stable
+      headless_chrome_path: /Users/toby/bin/chromedriver
 #      relaxedjs_path: /usr/local/bin/relaxed
 
   - i18n: