Update actions/checkout digest to c2d88d3

Author: renovate[bot]

.github/workflows/codeql.yml

@@ -31,7 +31,7 @@ jobs:
           egress-policy: audit
 
       - name: Checkout repository
-        uses: actions/checkout@71cf2267d89c5cb81562390fa70a37fa40b1305e
+        uses: actions/checkout@c2d88d3ecc89a9ef08eebf45d9637801dcee7eb5
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@ce729e4d353d580e6cacd6a8cf2921b72e5e310a