build(deps): bump actions/checkout from 3 to 4 (#38)

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>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install stable toolchain
       uses: actions-rs/toolchain@v1
       with:
@@ -34,7 +34,7 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install beta toolchain
       uses: actions-rs/toolchain@v1
       with:
@@ -54,7 +54,7 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install nightly toolchain
       uses: actions-rs/toolchain@v1
       with:

.github/workflows/security_audit.yml

@@ -6,7 +6,7 @@ jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}