Bump taiki-e/install-action from 2.77.4 to 2.77.6

Bumps [taiki-e/install-action](https://github.com/taiki-e/install-action) from 2.77.4 to 2.77.6.
- [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@v2.77.4...v2.77.6)

---
updated-dependencies:
- dependency-name: taiki-e/install-action
  dependency-version: 2.77.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -70,7 +70,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: install cargo-msrv
-      uses: taiki-e/install-action@v2.77.4
+      uses: taiki-e/install-action@v2.77.6
       with:
         tool: cargo-msrv
     - name: check MSRV