Update GitHub Actions to Node.js 24-native releases

## Summary

Current CI runs emit deprecation notices because several official GitHub Actions still select a Node.js 20 runtime and GitHub transparently forces Node.js 24.

## Relevant workflows

- `.github/workflows/rust.yml`
- `.github/workflows/release.yml`

The repeated actions include checkout, Python setup, and artifact upload steps.

## Scope

Move each official action to an upstream release that declares a supported Node.js 24 runtime. Preserve the current workflow behavior, permissions, cache keys, artifact names, and target matrix.

## Acceptance criteria

- Official action versions are updated consistently in both workflows.
- CI no longer reports Node.js 20 forced-upgrade warnings for those actions.
- Rust, corpus, cross-target, native example, and release jobs keep their current behavior.
- Action inputs are checked against the selected upstream release notes.
- No unrelated workflow refactor is included.

Start by reviewing .github/workflows/rust.yml and .github/workflows/release.yml, focusing on the checkout, Python setup, and artifact upload actions. Check the selected upstream releases and their input compatibility, then run the relevant CI workflows. Done means both workflows use Node.js 24-native action releases without changing permissions, caches, artifacts, matrices, or job behavior.

Written by the indexing model from the issue text.