Bump lxml from 4.9.3 to 4.9.4 (#481)

Bumps [lxml](https://github.com/lxml/lxml) from 4.9.3 to 4.9.4.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.9.3...lxml-4.9.4)

---
updated-dependencies:
- dependency-name: lxml
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -1,3 +1,3 @@
 # Testing tools
-lxml==4.9.3
+lxml==4.9.4
 pytest==7.4.3