message: docs(theme): fix demo
diff: @@ -11,42 +11,42 @@ tag:
  <!-- markdownlint-disable -->
  -# First Heading
  +# Heading 1
  <!-- markdownlint-restore -->
  ```md
  -# First Heading
  +# Heading 1
  ```
  -## Second Heading
  +## Heading 2
  ```md
  -## Second Heading
  +## Heading 2
  ```
  -### Third Heading
  +### Heading 3
  ```md
  -### Third Heading
  +### Heading 3
  ```
  -#### Fourth Heading
  +#### Heading 4
  ```md
  -#### Fourth Heading
  +#### Heading 4
  ```
  -##### Fifth Heading
  +##### Heading 5
  ```md
  -##### Fifth Heading
  +##### Heading 5
  ```
  -###### Sixth Heading
  +###### Heading 6
  ```md
  -###### Sixth Heading
  +###### Heading 6
  ```
  ## Text
  