Update dependency pydantic-settings to v2.3.1

[te25son]

This PR contains the following updates:

Package	Type	Update	Change
pydantic-settings (changelog)	dependencies	patch	2.3.0 -> 2.3.1

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Release Notes

pydantic/pydantic-settings (pydantic-settings)

### [`v2.3.1`](https://togithub.com/pydantic/pydantic-settings/releases/tag/v2.3.1) [Compare Source](https://togithub.com/pydantic/pydantic-settings/compare/v2.3.0...v2.3.1) #### What's Changed - Fix a regression in parsing env value for nested dict by [@​hramezani](https://togithub.com/hramezani) in [https://github.com/pydantic/pydantic-settings/pull/301](https://togithub.com/pydantic/pydantic-settings/pull/301) **Full Changelog**: https://github.com/pydantic/pydantic-settings/compare/v2.3.0...v2.3.1

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