Bump lxml from 5.3.1 to 6.0.0

Bumps [lxml](https://github.com/lxml/lxml) from 5.3.1 to 6.0.0.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-5.3.1...lxml-6.0.0)

---
updated-dependencies:
- dependency-name: lxml
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -14,7 +14,7 @@ dependencies = [
     "deepdiff==8.5.0",
     "emoji==2.14.1",
     "feedparser==6.0.11",
-    "lxml==5.3.1",
+    "lxml==6.0.0",
     "markdownify==1.1.0",
     "pydantic==2.10.6",
     "pydantic-settings==2.8.1",