#### Fix HTML block indentation drift in markdown list items (#19987 by @lazerg)

<!-- prettier-ignore -->
```markdown
<!-- Input -->
1. Enable images:

    <p align="center">
      <img alt="example">
    </p>

<!-- Prettier stable (--tab-width=4) -->
1. Enable images:

     <p align="center">
       <img alt="example">
     </p>

<!-- Prettier main (--tab-width=4) -->
1. Enable images:

    <p align="center">
      <img alt="example">
    </p>
```