Merge pull request #89 from ruby/dependabot/github_actions/step-security/harden-runner-2.9.1

Bump step-security/harden-runner from 2.9.0 to 2.9.1

Author: hsbt

.github/workflows/push_gem.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
       # Set up
       - name: Harden Runner
-        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        uses: step-security/harden-runner@5c7944e73c4c2a096b17a9cb74d65b6c2bbafbde # v2.9.1
         with:
           egress-policy: audit