Bump actions/checkout from 4 to 5

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/bench.yml

@@ -23,7 +23,7 @@ jobs:
             BENCHER_BRANCH: main
             BENCHER_API_TOKEN: ${{ secrets.BENCHER_API_TOKEN }}
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
 
             -   name: Install callgrind
                 run: |

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         name: Tests
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
             -   name: Install test dependencies
                 run: |
                     sudo apt-get update
@@ -39,7 +39,7 @@ jobs:
         env:
             RUSTDOCFLAGS: -Dwarnings
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
             -   name: Install Rust toolchain
                 uses: dtolnay/rust-toolchain@v1
                 with:
@@ -52,7 +52,7 @@ jobs:
         name: Clippy
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
             -   name: Install Rust toolchain
                 uses: dtolnay/rust-toolchain@v1
                 with:
@@ -65,7 +65,7 @@ jobs:
         name: Style
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
             -   name: Install Rust toolchain
                 uses: dtolnay/rust-toolchain@v1
                 with: