Update step-security/harden-runner action to v2.12.1

Author: renovate[bot]

.github/workflows/testing.yml

@@ -32,7 +32,7 @@ jobs:
         go: [ "1.17", "1.18", "1.19", "1.20", "1.21", "1.22" ]
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5c7944e73c4c2a096b17a9cb74d65b6c2bbafbde # v2.9.1
+        uses: step-security/harden-runner@002fdce3c6a235733a90a27c80493a3241e56863 # v2.12.1
         with:
           egress-policy: audit
           disable-telemetry: true