Bump lxml-html-clean from 0.3.1 to 0.4.0 in /requirements (#2036)

Bumps [lxml-html-clean](https://github.com/fedora-python/lxml_html_clean) from 0.3.1 to 0.4.0.
- [Changelog](https://github.com/fedora-python/lxml_html_clean/blob/main/CHANGES.rst)
- [Commits](fedora-python/lxml_html_clean@0.3.1...0.4.0)

---
updated-dependencies:
- dependency-name: lxml-html-clean
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/REQUIREMENTS-CI.txt

@@ -54,7 +54,7 @@ kiwisolver==1.4.7
 lazy_loader==0.4
 looseversion==1.3.0
 lxml==5.3.0
-lxml_html_clean==0.3.1
+lxml_html_clean==0.4.0
 m2r2==0.3.3.post2
 markdown-it-py==3.0.0
 MarkupSafe==3.0.1