[Bug] ToC contents are broken when a header(#) has a link.

[ryul1206]

Describe the bug
ToC contents are broken when a header(#) has a link.

To Reproduce

<!-- [[ multilingual toc: level=2 ]] -->

## Header1
## [Header2](https://www.google.com/)

This is converted to

1. [Header](#Header)
2. [[Header2](https://www.google.com/)](#Header2httpswwwgooglecom)

## Header1
## [Header2](https://www.google.com/)

Expected behavior

1. [Header1](#Header1)
2. [Header2](#Header2)

## Header1
## [Header2](https://www.google.com/)

Additional context

We need to check about

• When the whole header is one link. / When partial of the header is a link
• Markdown style link / HTML style link

[ryul1206]

Checklist

• When the whole header is one link. (solved)
• When partial of the header is a link (solved)
• Markdown style link (solved)
• HTML style link (solved)