docs: allow md in html

mkdocs.yml

@@ -1,9 +1,9 @@
 site_name: devenv
-site_description: 'Fast, Declarative, Reproducible, and Composable Developer Environments using Nix'
-site_url: 'https://devenv.sh'
-repo_name: 'cachix/devenv'
-repo_url: 'https://github.com/cachix/devenv'
-edit_uri: 'edit/main/docs'
+site_description: "Fast, Declarative, Reproducible, and Composable Developer Environments using Nix"
+site_url: "https://devenv.sh"
+repo_name: "cachix/devenv"
+repo_url: "https://github.com/cachix/devenv"
+edit_uri: "edit/main/docs"
 extra_css:
   - assets/top-level.css
 theme:
@@ -15,7 +15,7 @@ theme:
   custom_dir: docs/overrides
   palette:
     primary: white
-    accent: '#FBFBFB'
+    accent: "#FBFBFB"
   features:
     - content.action.edit
     - content.code.annotate
@@ -56,11 +56,11 @@ plugins:
       background_color: "#FBFBFB"
       color: "#425C82"
   rss:
-     use_git: false
-     match_path: blog/posts/.*
-     date_from_meta:
-       as_creation: date
-       as_update: date
+    use_git: false
+    match_path: blog/posts/.*
+    date_from_meta:
+      as_creation: date
+      as_update: date
 extra:
   social:
     - icon: fontawesome/brands/twitter
@@ -83,3 +83,5 @@ markdown_extensions:
       alternate_style: true
   - pymdownx.tasklist
   - pymdownx.tilde
+  - md_in_html
+  - attr_list