Bump lxml from 5.0.0 to 5.1.0

Bumps [lxml](https://github.com/lxml/lxml) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-5.0.0...lxml-5.1.0)

---
updated-dependencies:
- dependency-name: lxml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,6 +1,6 @@
 pip==23.3.2
 Sphinx==7.2.6
-lxml==5.0.0
+lxml==5.1.0
 flake8==7.0.0
 Jinja2==3.1.2
 pytz==2023.3.post1