Merge pull request #325 from ruby/dependabot/github_actions/step-security/harden-runner-2.19.0

Bump step-security/harden-runner from 2.17.0 to 2.19.0

Author: hsbt

.github/workflows/push_gem.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f808768d1510423e83855289c910610ca9b43176 # v2.17.0
+        uses: step-security/harden-runner@8d3c67de8e2fe68ef647c8db1e6a09f647780f40 # v2.19.0
         with:
           egress-policy: audit