Bump actions/checkout from 3 to 4 (#7)

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

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -28,7 +28,7 @@ jobs:
           - { name: "examples", features: "", test_sys: false }
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install dependencies
       run: apt-get update && apt-get install -y curl xvfb
     - name: "Install ${{ matrix.rust }} rust"

.github/workflows/semver.yml

@@ -17,7 +17,7 @@ jobs:
       run: |
         apt-get update && apt-get install -y curl git jq
         git config --global --add safe.directory ${GITHUB_WORKSPACE}
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Check semver
       uses: obi1kenobi/cargo-semver-checks-action@main
       with: