Roll dependency updates

[yvette-carlisle]

Summary

• roll site dependencies: astro to ^6.4.7 and marked to ^18.0.5
• refresh Cargo.lock transitive Rust deps: bon/bon-macros 3.9.3
• roll taiki-e/install-action to v2.81.11 and keep external action refs full-SHA pinned

Verification

• npm outdated --json -> {}
• cargo update --dry-run -> 0 packages to update
• actionlint .github/workflows/language.yml
• cargo make check

Dependency provenance

• taiki-e/install-action v2.81.11 -> 15449e3094499af05d8d964a1c884208e4b8b595