Update actions/attest action to v4.2.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/attest	action	minor	v4.1.1 → v4.2.1

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Release Notes

actions/attest (actions/attest)

v4.2.1

Compare Source

What's Changed

• Bump tar from 7.5.17 to 7.5.21 by @​dependabot[bot] in #​459
• fix: strip OCI image tag when pushing attestation to registry by @​bdehamer in #​464

Full Changelog: actions/attest@v4.2.0...v4.2.1

v4.2.0

Compare Source

What's Changed

• fix: split checksums on any line ending so LF files parse on Windows by @​bdehamer in #​443
• Bump @​actions/glob from 0.6.1 to 0.7.0 in the npm-production group across 1 directory by @​dependabot[bot] in #​435
• Bump csv-parse from 6.2.1 to 7.0.1 by @​dependabot[bot] in #​437
• Read subjects from GITHUB_ARTIFACTS_LIST by @​bdehamer in #​447
• Support SHA-2 subject digests by @​bdehamer in #​446

Full Changelog: actions/attest@v4.1.1...v4.2.0

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