Bump pydantic-core to v2.28.0

[Viicos]

Change Summary

Related issue number

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[cloudflare-workers-and-pages]

Deploying pydantic-docs with    Cloudflare Pages

Latest commit:	c4ad6b2
Status:	✅  Deploy successful!
Preview URL:	https://fa535e72.pydantic-docs.pages.dev
Branch Preview URL:	https://core-2-28-0.pydantic-docs.pages.dev

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[codspeed-hq]

CodSpeed Performance Report

Merging #11364 will improve performances by 21.98%

_{Comparing core-2-28-0 (c4ad6b2) with main (8fe3aae)}

Summary

⚡ 3 improvements
✅ 42 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_north_star_validate_json	49.8 ms	40.8 ms	+21.98%
⚡	test_north_star_validate_json_strict	49.6 ms	40.8 ms	+21.67%
⚡	test_north_star_validate_python_strict	23.8 ms	22.5 ms	+5.61%

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
pydantic
version.py
Project Total

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