build(deps): bump taiki-e/cache-cargo-install-action from 2 to 3

Bumps [taiki-e/cache-cargo-install-action](https://github.com/taiki-e/cache-cargo-install-action) from 2 to 3.
- [Release notes](https://github.com/taiki-e/cache-cargo-install-action/releases)
- [Changelog](https://github.com/taiki-e/cache-cargo-install-action/blob/main/CHANGELOG.md)
- [Commits](taiki-e/cache-cargo-install-action@v2...v3)

---
updated-dependencies:
- dependency-name: taiki-e/cache-cargo-install-action
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -240,7 +240,7 @@ jobs:
           toolchain: nightly-2025-10-18
           # ^ sync with https://github.com/awslabs/cargo-check-external-types/blob/main/rust-toolchain.toml
       - name: Install cargo-check-external-types
-        uses: taiki-e/cache-cargo-install-action@v2
+        uses: taiki-e/cache-cargo-install-action@v3
         with:
           tool: cargo-check-external-types
       - name: run cargo-check-external-types