Update step-security/harden-runner digest to ec9f2d5

Author: mend-for-github-com[bot]

.github/workflows/cherry-picker.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911
         with:
           egress-policy: audit
       - if: github.event.pull_request
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911
         with:
           egress-policy: audit
       - if: startsWith(github.event.issue.body, 'Forked from')