Bump actions/checkout from 4.1.0 to 4.1.1

Closes https://github.com/dart-lang/flute/pull/7

GitOrigin-RevId: e67784d3de34ebeea2c06b44c359488c22bf14e3
Change-Id: I145ed7c4a84dc63f6a9a87f1a219af6a28d0f517
Reviewed-on: https://dart-review.googlesource.com/c/flute/+/333143
Reviewed-by: Alexander Thomas <athom@google.com>
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 16b2d95..30e77f2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@
           echo "Running on ${{ runner.os }}"
           echo "Branch: ${{ github.ref }}; repo: ${{ github.repository }}."
       - name: Fetch sources
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - name: Install Dart SDK
         uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
         with: