build(deps): bump actions/checkout from 3 to 4 (#48)

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/ci.yml

@@ -18,7 +18,7 @@ jobs:
   spm-test:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Use multiple cores
       run: defaults write com.apple.dt.XCBuild EnableSwiftBuildSystemIntegration 1
     - name: Lint
@@ -47,7 +47,7 @@ jobs:
   linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: sersoft-gmbh/SwiftyActions@v3
         with:
           release-version: "5"
@@ -69,7 +69,7 @@ jobs:
     timeout-minutes: 20
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use multiple cores
         run: defaults write com.apple.dt.XCBuild EnableSwiftBuildSystemIntegration 1
       - name: Generate Docs

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
   docs:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use multiple cores
         run: defaults write com.apple.dt.XCBuild EnableSwiftBuildSystemIntegration 1
       - name: Build and Deploy Docs