chore(deps): relax xmltodict pin to >=0.13,<2 (#363)

## Summary
- Relaxes the `xmltodict` version constraint from `^0.13.0` to
`>=0.13,<2`, allowing upgrade to v1.0.4
- The library is only used as a fallback for XML parse/unparse in
`rigging/transform/xml_tools.py` and the API is stable across versions
- Verified `xmltodict.parse()` and `xmltodict.unparse()` roundtrip
correctly with v1.0.4
---

## Generated Summary

- Updated xmltodict dependency version constraint in pyproject.toml to
">=0.13,<2".
- Allows for greater flexibility and support for newer xmltodict
versions while avoiding breaking changes.

This summary was generated with ❤️ by
[rigging](https://docs.dreadnode.io/rigging/)

Author: GangGreenTemperTatum

poetry.lock

@@ -16,7 +16,7 @@ pydantic = "^2.7.3"
 pydantic-xml = "<=2.17.0"
 loguru = "^0.7.2"
 litellm = "==1.79.3"
-xmltodict = "^0.13.0"
+xmltodict = ">=0.13,<2"
 colorama = "^0.4.6"
 jsonpath-ng = "^1.7.0"
 ruamel-yaml = "^0.18.10"