chore(deps): update dependency astral-sh/uv to v0.12.1

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This PR contains the following updates:

Package	Update	Change
astral-sh/uv	patch	0.12.0 → 0.12.1

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Release Notes

astral-sh/uv (astral-sh/uv)

v0.12.1

Compare Source

Released on 2026-07-31.

Enhancements

• Add package-specific pre-release policies with --prerelease-package (#​20837)
• Support local HTML files as flat indexes (#​20802)
• Add Xonsh virtual environment activation scripts (activate.xsh) (#​19740)
• Preserve filesystem paths passed to uv add --index when updating pyproject.toml (#​20817)

Preview features

• Add automatic fixes to uv check with --fix (#​20793)
• Avoid rejecting unchanged metadata-free lockfiles when workspace dependencies share direct sources (#​20847)
• Honor direct URL constraints when validating metadata-free lockfiles (#​20796)
• Ignore malformed PEP 723 scripts discovered during project checks (#​20784)
• Use ty's native script exclusion in uv check (#​20742)

Performance

• Parse canonical uv lockfiles directly, with a fallback for other valid TOML syntax (#​20648)
• Accelerate SHA-256 hashing on non-Windows ARM64 platforms (#​20805)

Bug fixes

• Flush shell startup file updates before uv tool update-shell and uv python update-shell exit (#​20842)
• Make workspace-root dependency groups available to commands run from workspace members (#​20840)
• Resolve --find-links paths in requirements files relative to the containing file (#​20832)
• Respect configured indexes in uv tool list --outdated (#​20770)

Documentation

• Document Astral GPU indexes in the PyTorch guide (#​20785)
• Use consistent dependency-group argument descriptions throughout the CLI documentation (#​20823)

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