Merge pull request #705 from ruby/dependabot/github_actions/step-security/harden-runner-2.16.0

Bump step-security/harden-runner from 2.15.0 to 2.16.0

Author: matzbot

.github/workflows/push_gem.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
+        uses: step-security/harden-runner@fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594 # v2.16.0
         with:
           egress-policy: audit