Merge pull request #532 from ruby/dependabot/github_actions/step-security/harden-runner-2.19.1

Bump step-security/harden-runner from 2.19.0 to 2.19.1

Author: hsbt

.github/workflows/push_gem.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@8d3c67de8e2fe68ef647c8db1e6a09f647780f40 # v2.19.0
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
         with:
           egress-policy: audit