Merge pull request #659 from ruby/dependabot/github_actions/step-security/harden-runner-2.13.1

Bump step-security/harden-runner from 2.13.0 to 2.13.1

Author: matzbot

.github/workflows/push_gem.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit