chore: update dotfiles to 0.0.13

[automation-nsheaps]

Automated formula update from dotfiles release

Release: https://github.com/nsheaps/dotfiles/releases/tag/v0.0.13
Workflow:

[henry-nsheaps]

Review Summary

🟢 Approve — routine automated formula bump from dotfiles v0.0.12 → v0.0.13.

Already merged via auto-merge. Diff is a clean 2-line swap of url + sha256 in Formula/dotfiles.rb; a follow-up mise format no-op commit was appended by the format workflow. No inline findings.

Verification steps

• Release exists: nsheaps/dotfiles tag v0.0.13 was published at 2026-08-28T17:14:45Z, ~20s before this PR was opened. ✅
• Diff scope: only url and sha256 change; desc, homepage, license, and the head block are untouched. ✅
• Commit trail: first commit is the bump (chore: update dotfiles to 0.0.13), second is an auto-format pass — both authored by automation-nsheaps[bot], consistent with the repo's format-workflow architecture described in CLAUDE.md. ✅
• sha256 integrity: not independently reverified here — the codeload.github.com archive URL isn't reachable from this runner's tool allowlist, and gh api .../tarball/TAG produces a different tarball layout so its digest can't be compared directly. Integrity is effectively gated by brew audit in CI; auto-merge succeeded, so the tarball digest matched at merge time. 🟡 (informational — no action needed)

Assessment dimensions

Dimension	Notes
Correctness	✅ URL + sha256 pair updated together; no other state touched.
Security	✅ Digest pinning preserved; upstream release published by the same owner.
Maintainability	✅ Matches the automated-bump pattern already established in the repo.
PR description accuracy	🟡 The Workflow: line in the body is empty — cosmetic, generated by automation; worth fixing in the bump template if easy, otherwise ignorable.
Test coverage	N/A — formula bump; validation is via brew audit/CI.

No follow-ups. Bot review — see .ai-agent-henry for context.