build(deps): bump actions/checkout from 6 to 7 (#138)

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Check formatting
         run: cargo fmt -- --check
       - name: Check Clippy
@@ -41,7 +41,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Run tests
         run: cargo test --all
 
@@ -74,7 +74,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Install Rust targets
         run: rustup target add "$TARGET" "$TOOLS_TARGET"
         env: