chore: bump xml from 5.4.1 to 6.0.1 (#792)

Bumps [xml](https://github.com/renggli/dart-xml) from 5.4.1 to 6.0.1.
- [Release notes](https://github.com/renggli/dart-xml/releases)
- [Changelog](https://github.com/renggli/dart-xml/blob/main/CHANGELOG.md)
- [Commits](renggli/dart-xml@5.4.1...6.0.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   meta: ^1.3.0
   path: ^1.8.0
   source_span: ^1.8.0
-  xml: ^5.3.0
+  xml: ">=5.3.0 <7.0.0"
   yaml: ^3.1.0
 
 dev_dependencies: