chore(docker): update docker digests

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker.io/golang	stage	digest	ba6ba81 → 60e626b

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[DeepDiver1975]

🤖 Automated review by Claude Code review agent.

Verdict: approve (low-risk). Single-line digest re-pin of the go-builder base image in v8/Dockerfile.multiarch: same tag golang:1.25.11-alpine3.23, digest updated to a new well-formed sha256: pin. No other files touched.

• Diff: 1 file, +1/-1 — digest only, tag unchanged. Well-formed sha256.
• Checks: all required green — both build matrices (amd64 + arm64, v8 and default), lint, lint-editorconfig, prepare all pass. The only non-pass entries (merge, update-docker-hub-description) are post-merge gating jobs reported as skipping; they are not blocking. The earlier UNSTABLE state has cleared (now CLEAN/MERGEABLE).
• CHANGELOG: n-a — digest re-pins follow this repo's convention of no changelog entry (cf. #13–#16).

No concerns.

[DeepDiver1975]

🤖 Automated approval by Claude Code review agent. Clean digest re-pin of the golang:1.25.11-alpine3.23 builder base image (tag unchanged, well-formed sha256); all required checks green.