Bump lxml from 5.3.1 to 6.0.2

Bumps [lxml](https://github.com/lxml/lxml) from 5.3.1 to 6.0.2.
- [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-5.3.1...lxml-6.0.2)

---
updated-dependencies:
- dependency-name: lxml
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -12,7 +12,7 @@ django-oauth-toolkit==2.4.0
 django-debug-toolbar==4.3.0
 bleach==6.2.0
 gunicorn==23.0.0
-lxml==5.3.1
+lxml==6.0.2
 Markdown==3.7
 Pillow==11.3.0
 psycopg2-binary==2.9.10