Bump taiki-e/install-action from 2.21.7 to 2.21.8

Bumps [taiki-e/install-action](https://github.com/taiki-e/install-action) from 2.21.7 to 2.21.8.
- [Release notes](https://github.com/taiki-e/install-action/releases)
- [Changelog](https://github.com/taiki-e/install-action/blob/main/CHANGELOG.md)
- [Commits](taiki-e/install-action@11dea51...b4f94d4)

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

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

.github/workflows/checks.yaml

@@ -72,7 +72,7 @@ jobs:
         with:
           target: ${{ matrix.target }}
       - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@11dea51b35bc2bfa42820716c6cabb14fd4c3266
+        uses: taiki-e/install-action@b4f94d444931c93a5a6d9c6bd65a585838d0f765
         with:
           tool: cargo-llvm-cov
       - name: Rust cache
@@ -104,7 +104,7 @@ jobs:
         with:
           toolchain: nightly
       - name: Install udeps
-        uses: taiki-e/install-action@11dea51b35bc2bfa42820716c6cabb14fd4c3266
+        uses: taiki-e/install-action@b4f94d444931c93a5a6d9c6bd65a585838d0f765
         with:
           tool: cargo-udeps
       - name: cargo udeps
@@ -208,7 +208,7 @@ jobs:
           version: 0.9.0
         if: ${{matrix.use_zig}}
       - name: Install cargo-zigbuild
-        uses: taiki-e/install-action@11dea51b35bc2bfa42820716c6cabb14fd4c3266
+        uses: taiki-e/install-action@b4f94d444931c93a5a6d9c6bd65a585838d0f765
         with:
           tool: cargo-zigbuild
         if: ${{matrix.use_zig}}
@@ -249,7 +249,7 @@ jobs:
         with:
           toolchain: nightly
       - name: Install cargo fuzz
-        uses: taiki-e/install-action@11dea51b35bc2bfa42820716c6cabb14fd4c3266
+        uses: taiki-e/install-action@b4f94d444931c93a5a6d9c6bd65a585838d0f765
         with:
           tool: cargo-fuzz
       - name: Smoke-test fuzz targets