Bump lxml from 4.9.1 to 6.1.0 in /modules/sync (#293)

Bumps [lxml](https://github.com/lxml/lxml) from 4.9.1 to 6.1.0.
- [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-4.9.1...lxml-6.1.0)

---
updated-dependencies:
- dependency-name: lxml
  dependency-version: 6.1.0
  dependency-type: direct:production
...

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modules/sync/requirements.txt

@@ -1,5 +1,5 @@
 cssselect==0.9.2
-lxml==4.9.1
+lxml==6.1.0
 Markdown==3.8.1
 Pillow==12.2.0
 pymongo==4.6.3