Bump lxml from 4.9.3 to 4.9.4

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](https://github.com/lxml/lxml/compare/lxml-4.9.3...lxml-4.9.4)

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

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

requirements.txt

@@ -35,7 +35,7 @@ humanize==4.9.0
 jikanpy==4.3.2
 
 # ==== L ====
-lxml==4.9.3
+lxml==4.9.4
 
 # ==== M ====
 markdown2==2.4.11