build(deps): bump taiki-e/install-action from 2.87.2 to 2.87.8 (#8709)

Bumps [taiki-e/install-action](https://github.com/taiki-e/install-action) from 2.87.2 to 2.87.8.
- [Release notes](https://github.com/taiki-e/install-action/releases)
- [Changelog](https://github.com/taiki-e/install-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/taiki-e/install-action/compare/1ed6d7be6168f6c9046541087ff549b6bc581fdf...d438492cf8a250514fa2d34b30bc3c0dc37c65ff)

---
updated-dependencies:
- dependency-name: taiki-e/install-action
  dependency-version: 2.87.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

(cherry picked from commit 458441b3ab)
Assisted-by: Codex:gpt-6

.github/workflows/cron-ci.yaml

@@ -33,7 +33,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@stable
 
-      - uses: taiki-e/install-action@1ed6d7be6168f6c9046541087ff549b6bc581fdf # v2.87.2
+      - uses: taiki-e/install-action@d438492cf8a250514fa2d34b30bc3c0dc37c65ff # v2.87.8
         with:
           tool: cargo-llvm-cov