Update actions/checkout digest to a5ac7e5 (#68)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
       with:
         fetch-depth: 1