build(deps): bump lxml from 6.0.2 to 6.0.4

Bumps [lxml](https://github.com/lxml/lxml) from 6.0.2 to 6.0.4.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-6.0.2...lxml-6.0.4)

---
updated-dependencies:
- dependency-name: lxml
  dependency-version: 6.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -12,7 +12,7 @@ Flask==3.1.3
 idna==3.11
 itsdangerous==2.2.0
 Jinja2==3.1.6
-lxml==6.0.2
+lxml==6.0.4
 Markdown==3.10.2
 MarkupSafe==3.0.3
 numpy==2.4.4