mkdocs.yml: Drop removed "codehilite" option

Author: iBug

mkdocs.yml

@@ -60,13 +60,13 @@ extra_css:
 markdown_extensions:
   - admonition
   - attr_list
-  - codehilite
   - footnotes
   - markdown.extensions.def_list
   - pymdownx.details
   - pymdownx.emoji:
       emoji_index: !!python/name:material.extensions.emoji.twemoji
       emoji_generator: !!python/name:material.extensions.emoji.to_svg
+  - pymdownx.highlight
   - pymdownx.inlinehilite
   - pymdownx.mark
   - pymdownx.superfences: