build(deps): bump actions/checkout from 3 to 4 (#75)

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

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
  runs-on: ubuntu-latest
  steps:
  - name: Check out repository
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
  - name: Check spelling
  uses: streetsidesoftware/cspell-action@v3
  with:
@@ -36,7 +36,7 @@ jobs:
  needs: min-conditions
  steps:
  - name: Check out repository
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
  - name: Install dart
  uses: dart-lang/setup-dart@v1
  - name: Install melos
@@ -57,7 +57,7 @@ jobs:
  os: [macos-latest, windows-latest, ubuntu-latest]
  steps:
  - name: Check out repository
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
  - name: Install dart
  uses: dart-lang/setup-dart@v1
  - name: Install melos
@@ -98,7 +98,7 @@ jobs:
  runs-on: ubuntu-latest
  steps:
  - name: Check out repository
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
  - name: Install dart
  uses: dart-lang/setup-dart@v1
  - name: Install melos