Bump actions/checkout from 3.6.0 to 4.1.0 (dart-lang/string_scanner#64)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.1.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/f43a0e5ff2bd294095638e18286ca9a3d1956744...8ade135a41bc03ea155e62e844d188df1ea18608)

---
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>

pkgs/string_scanner/.github/workflows/test-package.yml

diff --git a/pkgs/string_scanner/.github/workflows/test-package.yml b/pkgs/string_scanner/.github/workflows/test-package.yml
index b187c46..657b236 100644
--- a/pkgs/string_scanner/.github/workflows/test-package.yml
+++ b/pkgs/string_scanner/.github/workflows/test-package.yml
@@ -22,7 +22,7 @@
       matrix:
         sdk: [dev]
     steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
       - uses: dart-lang/setup-dart@8a4b97ea2017cc079571daec46542f76189836b1
         with:
           sdk: ${{ matrix.sdk }}
@@ -49,7 +49,7 @@
         os: [ubuntu-latest]
         sdk: [3.0.0, dev]
     steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
       - uses: dart-lang/setup-dart@8a4b97ea2017cc079571daec46542f76189836b1
         with:
           sdk: ${{ matrix.sdk }}