Bump the app group with 1 update

Bumps the app group with 1 update: [lxml](https://github.com/lxml/lxml).


Updates `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
dependency-group: app
...

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

requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.9.1
 beautifulsoup4==4.12.2
 geopandas==0.14.1
-lxml==4.9.3
+lxml==4.9.4
 numpy==1.26.2  # pinned for snyk
 pyogrio==0.7.2
 restgdf==1.0.0