Update mkdocs.yml

Author: hjgraca

mkdocs.yml

@@ -71,9 +71,12 @@ markdown_extensions:
       permalink: true
       toc_depth: 4
   - attr_list
+  - def_list
+  - pymdownx.tasklist:
+      custom_checkbox: true
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - pymdownx.inlinehilite
   - pymdownx.superfences:
       custom_fences: