Update pydantic-settings to 2.3.0

[pyup-bot]

This PR updates pydantic-settings from 2.2.1 to 2.3.0.

Changelog

2.3.0

What's Changed
* Add environment parsing support for enums. by kschwab in https://github.com/pydantic/pydantic-settings/pull/252
* Improve `explode_env_vars` for better dict handling by hramezani in https://github.com/pydantic/pydantic-settings/pull/261
* add `PyprojectTomlConfigSettingsSource` by ITProKyle in https://github.com/pydantic/pydantic-settings/pull/255
* Fix broken link in AliasChoices class by keenranger in https://github.com/pydantic/pydantic-settings/pull/271
* Update Pydantic by hramezani in https://github.com/pydantic/pydantic-settings/pull/273
* fix: superfluous deep env conflicts with non-dict model leaf by diefans in https://github.com/pydantic/pydantic-settings/pull/276
* fix: a second level of environment nesting expected a dict by diefans in https://github.com/pydantic/pydantic-settings/pull/281
* Fix an issue when inner types of a discriminated union with a callable discriminator were not correctly identified as complex. by jenskeiner in https://github.com/pydantic/pydantic-settings/pull/285
* Fix a bug when we have case insentive field in nested model by hramezani in https://github.com/pydantic/pydantic-settings/pull/294
* Add CLI Settings Source by kschwab in https://github.com/pydantic/pydantic-settings/pull/214

New Contributors
* ITProKyle made their first contribution in https://github.com/pydantic/pydantic-settings/pull/255
* keenranger made their first contribution in https://github.com/pydantic/pydantic-settings/pull/271
* diefans made their first contribution in https://github.com/pydantic/pydantic-settings/pull/276
* jenskeiner made their first contribution in https://github.com/pydantic/pydantic-settings/pull/285

**Full Changelog**: https://github.com/pydantic/pydantic-settings/compare/v2.2.1...v2.3.0

Links

• PyPI: https://pypi.org/project/pydantic-settings
• Changelog: https://data.safetycli.com/changelogs/pydantic-settings/