Update html-pipeline at least to 2.0 - HTML tags

Please, update html-pipeline at least to 2.0 in order to HTML tags in markdown work according to documentation:

<details><summary>&#9733; About html-pipeline-2.0</summary>
Start from 2.0 html-pipeline has [merge 171 ](https://github.com/jch/html-pipeline/pull/171) that fix `<summary>` and `<details>` tags.
</details>

★ About html-pipeline-2.0

Start from 2.0 html-pipeline has merge 171 that fix `

` and `

` tags.