fix(deps): update module github.com/google/go-containerregistry to v0.21.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/google/go-containerregistry	v0.21.3 → v0.21.4

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

google/go-containerregistry (github.com/google/go-containerregistry)

v0.21.4

Compare Source

What's Changed

• go.mod: do not make a viral minimum go version by @​howardjohn in #​2237
• Avoid pruning absolute links from extracted and flattened images by @​Subserial in #​2241
• Bump the go-deps group across 3 directories with 5 updates by @​dependabot[bot] in #​2245
• fix: update to go1.25.8, and use separate .go-version file by @​thaJeztah in #​2246
• Bump CI go version to 1.26.1 by @​Subserial in #​2242
• Bump codecov/codecov-action from 5.5.2 to 5.5.3 in the actions group by @​dependabot[bot] in #​2240
• fork distribution client v3 auth-challenge as an internal package (squashed) by @​thaJeztah in #​2248
• transport: validate Bearer realm URL to prevent SSRF by @​evilgensec in #​2243
• revert path traversal and symlink escape from #​2227 by @​Subserial in #​2250
• Fix pkg/v1/google/auth tests for arm64 by @​Subserial in #​2085
• goreleaser: Update goreleaser config and GH action by @​Subserial in #​2253

New Contributors

• @​evilgensec made their first contribution in #​2243

Full Changelog: google/go-containerregistry@v0.21.3...v0.21.4

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 2 additional dependencies were updated

Details:

Package	Change
github.com/docker/cli	v29.3.0+incompatible -> v29.3.1+incompatible
github.com/klauspost/compress	v1.18.4 -> v1.18.5

[github-actions]

Registry Build Preview

All registries built successfully!

Registry: official

• Total Servers: 67
  • Container-based: 46
  • Remote: 21
• Skills: 0
• File Size: 1.4M
• Last Updated: 2026-04-06T20:40:34Z

Registry: toolhive

• Total Servers: 107
  • Container-based: 80
  • Remote: 27
• Skills: 3
• File Size: 1.7M
• Last Updated: 2026-04-06T20:40:34Z