Support rendering keys

For more info:
https://squidfunk.github.io/mkdocs-material/setup/extensions/python-markdown-extensions/#keys

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

cookiecutter/{{cookiecutter.github_repo_name}}/mkdocs.yml

@@ -71,6 +71,7 @@ markdown_extensions:
       anchor_linenums: true
       line_spans: __span
       pygments_lang_class: true
+  - pymdownx.keys
   - pymdownx.snippets:
       check_paths: true
   - pymdownx.superfences: