Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/check.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
       - uses: actions-rs/toolchain@v1
@@ -92,7 +92,7 @@ jobs:
           version: 0.14.2
           use-tool-cache: true
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Test
         run: |
           cargo test --all-features
@@ -114,7 +114,7 @@ jobs:
     steps:
       - name: Set up Rust
         uses: hecrj/setup-rust-action@v1
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Publish
         shell: bash
         run: |