fix(ci): bump actionlint to v1.7.8 for macos-15-intel runner label

[proerror77]

Change contract

Workflow lint (actionlint) passes on release-rust.yml again. The job pins actionlint v1.7.7, whose built-in GitHub-hosted runner label list predates macos-15-intel, so any PR touching .github/workflows/release-rust.yml failed lint with label "macos-15-intel" is unknown (pre-existing issue surfaced during #799). The fix is a one-line pin bump to v1.7.8, which recognizes the label.

Issue relationship

None

Out of scope

• The release-rust.yml sccache flip is a separate, later PR.
• No changes to release-rust.yml itself.

Dependencies and merge order

None

Focused validation

• Runner truth: macos-15-intel is a real GitHub-hosted runner label (macOS 15, Intel, 4 vCPU) per the official runner reference; the repo has zero self-hosted runners (gh api repos/proerror77/monday/actions/runners -> total_count: 0), so the label can only be GitHub-hosted.
• Reproduced locally: actionlint v1.7.7 fails on .github/workflows/release-rust.yml with label "macos-15-intel" is unknown (exit 1).
• Fixed locally: actionlint v1.7.8 passes on release-rust.yml and on every workflow under .github/workflows/ (exit 0).
• bash .github/scripts/test-select-rust-ci-scope.sh -> rust CI scope selector tests passed.
• git diff --check clean.

Rollout and rollback

None. CI-only change; rollback is reverting the pin.

Scope exception

None

[coderabbitai]

Caution

Review failed

An error occurred during the review process. Please try again later.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/actionlint-macos-15-intel

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}