Update actions/checkout digest to a5ac7e5

Author: renovate[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout code
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@2.16.0