I have a GitHub repository with README in it. I want to show the content of the readme on a custom domain. It works. However, the resulting version adds an h1 tag with a link to the custom domain.

<h1>
    <a href="https://goxygen.dev/">goxygen</a>
</h1>

It is absent in my readme file and I don’t won’t it there either.

Q: How to remove the h1 tag with the repository name from the GitHub pages website?

Note: I am using the /docs folder of the website branch as a GitHub pages source.

I also have the exact configuration for my other project (repository and site) and such a tag is not added.