fix(deps): update module github.com/sigstore/sigstore to v1.4.4

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
github.com/sigstore/sigstore	require	patch	v1.4.2 -> v1.4.4

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Release Notes

sigstore/sigstore

v1.4.4

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NOTE: Fixed TUF root initialization with GCS bucket. This affects anyone who uses their own TUF root hosted on GCS, and specifies the GCS bucket only by name and not by HTTP path.

What's Changed

• Fix remoteFromMirror with GCS bucket by @​haydentherapper in https://github.com/sigstore/sigstore/pull/734

Full Changelog: sigstore/sigstore@v1.4.3...v1.4.4

v1.4.3

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What's Changed

• Add support for file based remote stores for airgap mode. by @​vaikas in https://github.com/sigstore/sigstore/pull/715
• Handle invalid elliptic curve gracefully when verifying signature by @​haydentherapper in https://github.com/sigstore/sigstore/pull/728
• tuf: fix on-disk cache when writing targets in subfolders by @​asraa in https://github.com/sigstore/sigstore/pull/729

Full Changelog: sigstore/sigstore@v1.4.2...v1.4.3

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