Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Install Chef
         uses: actionshub/[email protected]
       - name: Dokken