Update step-security/harden-runner digest to 20cf305 (#2345)

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

Author: renovate[bot]

.github/workflows/codeql.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@95d9a5deda9de15063e7595e9719c11c38c90ae2
+        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76
         with:
           egress-policy: audit