Bump taiki-e/install-action from 2.87.20 to 2.87.21 (#1312)

Bumps [taiki-e/install-action](https://github.com/taiki-e/install-action) from 2.87.20 to 2.87.21.
- [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/v2.87.20...v2.87.21)

---
updated-dependencies:
- dependency-name: taiki-e/install-action
  dependency-version: 2.87.21
  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>

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
         with:
           key: ${{ matrix.os }}
       - name: Install just
-        uses: taiki-e/install-action@v2.87.20
+        uses: taiki-e/install-action@v2.87.21
         with:
           tool: just
       - name: Run lints + tests