Update dependency @actions/artifact to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@actions/artifact (source)	5.0.3 → 6.2.1

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Release Notes

actions/toolkit (@​actions/artifact)

v6.2.1

• Support the RFC 5987 filename* field in the content-disposition header. This allows us to correctly download files and artifacts with Chinese/Japanese/Korean (among other) characters in their name.

v6.2.0

• Support uploading single un-archived files (not zipped). Direct uploads are only supported for artifacts version 7+ (based on the major version of actions/upload-artifact). Callers must pass the skipArchive option to uploadArtifact. Only single files can be uploaded at a time right now. Default behavior should remain unchanged if skipArchive = false. When skipArchive = true, the name of the file is used as the name of the artifact for consistency with the downloads: you upload artifact.txt, you download artifact.txt.

v6.1.0

• Support downloading non-zip artifacts. Zipped artifacts will be decompressed automatically (with an optional override). Un-zipped artifacts will be downloaded as-is.

v6.0.0

• Breaking change: Package is now ESM-only
  • CommonJS consumers must use dynamic import() instead of require()

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