Bump sphinxcontrib-httpdomain from 1.8.0 to 1.8.1

Bumps [sphinxcontrib-httpdomain](https://github.com/sphinx-contrib/httpdomain) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/sphinx-contrib/httpdomain/releases)
- [Changelog](https://github.com/sphinx-contrib/httpdomain/blob/main/doc/changelog.rst)
- [Commits](sphinx-contrib/httpdomain@1.8.0...1.8.1)

---
updated-dependencies:
- dependency-name: sphinxcontrib-httpdomain
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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