ci(deps): update jdx/mise-action action to v4.2.5

[github-actions]

Why

A bot proposed this change and no human refined it, which is exactly the
case CLOUD-693 exists for:
the row is derived from the pull request's own manifest diff so the merge
moves the board like any other landing. Nothing here was authored by an
agent, and nothing here is a judgement.

Pull request: #676 (renovate/actions, opened by renovate[bot]).

Manifests touched:

• .github/workflows/auto-bot-land.yml
• .github/workflows/auto-release-land.yml
• .github/workflows/branch-hygiene.yml
• .github/workflows/ci-drift.yml
• .github/workflows/ci.yml
• .github/workflows/commit-lint.yml
• .github/workflows/coverage.yml
• .github/workflows/fuzz.yml
• .github/workflows/hook-latency-drift.yml
• .github/workflows/land-divergence.yml
• .github/workflows/lock-currency.yml
• .github/workflows/nonverdict-rate.yml
• .github/workflows/perf.yml
• .github/workflows/release-artifacts.yml
• .github/workflows/release-assets.yml
• .github/workflows/release-plz.yml
• .github/workflows/rust.yml
• .github/workflows/scorecard.yml
• .github/workflows/timeout-drift.yml
• .github/workflows/zizmor-advisories.yml
• .github/workflows/zizmor.yml

Refinement — Ready

Refinement gate: Definition of Ready & Done. This body carries only specializations.

• Source of truth (§1). The manifest diff on ci(deps): update actions #676. It is the one
  description of this change that cannot disagree with the change, which
  is why nothing here re-types the versions it carries.
• Computable predicate (§2). Every required check green on the head
  SHA, decided by mise run checks-green — the same predicate that
  gates every other landing, asked of the SHA that fast-forwards.
• Effect (§3). No command-surface change: a dependency or toolchain
  bump moves no verb, no flag and no effect row.
• Output & exit (§5). Unchanged — this row proposes no new output.
• Commit / bump (§6). ci → no bump.
• Test obligation (§7). The existing suite, unchanged and unskipped:
  a bump whose breakage this repo covers reds CI, and one it does not is
  a coverage gap to file rather than a reason to hold the bump.
• Blockers (§8). None.

Acceptance

• ci(deps): update actions #676 lands on main by fast-forward with every required check green,
  through auto-bot-land.yml and with no human in the loop.
• This row moves to In Review by the merge, from the Closes key in the
  pull request body.

[linear-code]

CLOUD-999