chore(deps): update astral-sh/setup-uv action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
astral-sh/setup-uv	action	major	v3.2.4 -> v4.0.0

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Release Notes

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

v4.0.0: 🌈 Fail when cache local path does not exist when trying to cache

Compare Source

🚨 Breaking change 🚨

By default, the action will now fail if caching is enabled but there is nothing to upload (the uv cache directory does not exist).
If you want to ignore this, set the ignore-nothing-to-cache input to true.

- name: Ignore nothing to cache
  uses: astral-sh/setup-uv@v3
  with:
    enable-cache: true
    ignore-nothing-to-cache: true

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In previous releases only an error got logged when saving the cache failed. In most cases users did not realize something was wrong with their config.

Changes

🚨 Breaking changes

• Fail when cache local path does not exist when trying to cache @​eifinger (#​163)

🐛 Bug fixes

• Fail when cache local path does not exist when trying to cache @​eifinger (#​163)
• Remove working dir from cacheDependencyGlob error message @​eifinger (#​162)

📚 Documentation

• Change some formulations in README.md @​eifinger (#​164)
• Add comment to clarify process.exit(0) @​eifinger (#​161)

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Configuration

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🚦 Automerge: Enabled.

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[IndexSeek]

We are not encountering any issues with writing or restoring uv cache in actions. It seems that the uv cache directory exists in all cases.