Bump actions/checkout from 4.1.0 to 4.1.1 (#307)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.0 to 4.1.1.
- [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/8ade135a41bc03ea155e62e844d188df1ea18608...b4ffde65f46336ab88eb53be808477a3936bae11)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a867cb0..ad1b3a1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@
     steps:
       # These are the latest versions of the github actions; dependabot will
       # send PRs to keep these up-to-date.
-      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
         with:
           sdk: ${{ matrix.sdk }}