build(deps): bump lxml from 4.9.3 to 6.1.0

Bumps [lxml](https://github.com/lxml/lxml) from 4.9.3 to 6.1.0.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.9.3...lxml-6.1.0)

---
updated-dependencies:
- dependency-name: lxml
  dependency-version: 6.1.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements.txt

@@ -42,7 +42,7 @@ jsonref==1.1.0
     #   ocdsextensionregistry
     #   ocdskit
     #   ocdsmerge
-lxml==4.9.3
+lxml==6.1.0
     # via flattentool
 numpy==1.24.4
     # via

requirements_dev.txt

@@ -65,7 +65,7 @@ jsonref==1.1.0
     #   ocdsextensionregistry
     #   ocdskit
     #   ocdsmerge
-lxml==4.9.3
+lxml==6.1.0
     # via
     #   -r requirements.txt
     #   flattentool