Bump lxml from 4.8.0 to 4.9.0 in /src/requirements

Bumps [lxml](https://github.com/lxml/lxml) from 4.8.0 to 4.9.0.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.8.0...lxml-4.9.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/requirements/production.txt

@@ -24,7 +24,7 @@ html5lib==1.1
 icalendar==4.0.9
 ipython==8.3.0
 irc3==1.1.7
-lxml==4.8.0
+lxml==4.9.0
 olefile==0.46
 openpyxl==3.0.9
 pandas==1.4.2