Bump actions/checkout from 4.1.1 to 4.1.2 (#295)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.1 to 4.1.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@b4ffde6...9bb5618)

---
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>

.github/workflows/ci.yaml

@@ -20,7 +20,7 @@ jobs:
       matrix:
         sdk: [dev]
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
     - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
       with:
         sdk: ${{ matrix.sdk }}
@@ -42,7 +42,7 @@ jobs:
         os: [ubuntu-latest]
         sdk: [3.0.0, stable, dev]
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
     - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
       with:
         sdk: ${{ matrix.sdk }}
@@ -68,7 +68,7 @@ jobs:
         os: [ubuntu-latest]
         sdk: [3.0.0, stable, dev]
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
     - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
       with:
         sdk: ${{ matrix.sdk }}