🤖 ci: fix GoReleaser warnings

[ThomasK33]

Summary

• Fixes GoReleaser warnings seen in Actions run 22005983139 (job 63589721092) by pinning the action to GoReleaser v2 and updating our GoReleaser configuration to v2.

Background

• The release workflow was installing GoReleaser with version: latest, and GoReleaser v2 emits warnings for v0/v1 config and several deprecated keys.

Implementation

• Pin goreleaser/goreleaser-action to version: "~> v2".
• Update .goreleaser.yaml:
  • add version: 2
  • migrate archives.format -> archives.formats
  • migrate dockers -> dockers_v2
• Update Dockerfile.goreleaser to use $TARGETPLATFORM/... copy layout required by dockers_v2.

Validation

• goreleaser check
• go run github.com/rhysd/actionlint/cmd/actionlint@v1.7.10
• make test
• make build
• make verify-vendor
• make lint

Risks

• Low; changes are limited to release tooling/config.

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Generated with mux • Model: openai:gpt-5.2 • Thinking: xhigh • Cost: $0.00

[ThomasK33]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Breezy!

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[ThomasK33]

https://mux.md/1tEik#Xu6KiL1qNlaWsw

[ThomasK33]

@codex review

Fixed merge-queue E2E failure by building the binary into the $TARGETPLATFORM directory layout expected by Dockerfile.goreleaser.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 👍

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".