Deps: Bump sphinxcontrib-htmlhelp from 2.0.1 to 2.0.4

Bumps [sphinxcontrib-htmlhelp](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp) from 2.0.1 to 2.0.4.
- [Release notes](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/releases)
- [Changelog](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/blob/2.0.4/CHANGES)
- [Commits](sphinx-doc/sphinxcontrib-htmlhelp@2.0.1...2.0.4)

---
updated-dependencies:
- dependency-name: sphinxcontrib-htmlhelp
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>