Bump actions/checkout from 4 to 5 in /.github/workflows

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/rust.yaml

@@ -6,19 +6,19 @@ jobs:
   formatting:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: cargo fmt --all -- --check
 
   clippy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: cargo clippy --all --all-targets -- -Dwarnings
 
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Test all-targets
       run: cargo test --workspace --all-targets
     - name: Test docs
@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Build-test docs
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Document all crates
       env:
         RUSTDOCFLAGS: -Dwarnings